Jason Biggs, the "American Pie" actor lending his voice to Leonardo in Nickelodeon's upcoming "Teenage Mutant Ninja Turtles" series, received major backlash from parenting groups and conservatives for some controversial tweets he made during the Republican National Convention last week, reports The Hollywood Reporter.

In a series of tweets that have now been deleted, Biggs crossed the line when he made sexual comments about Ann Romney and Janna Ryan.

Biggs is known for his off-color sense of humor, so it's surprising that @TMNTMaster, the account used to promote Nickeoledon's Turtles series, encouraged followers to take a gander at Biggs' account on Sept. 1.

Biggs' tweets caught the attention of Fox host Megyn Kelly, who was appalled by the actor's lewd tweets, and called him a "disgusting pig," reports Mediaite.

After many calls for the children's programming channel to fire Biggs, the actor deleted the tweets and Nickelodeon issued an apology on Sept. 5:

“Nickelodeon does not support or condone the use of graphic or vulgar language on any of our platforms,” the network said in a statement. “It was our mistake to link from our Teenage Mutant Ninja Turtles twitter feed to Jason’s personal twitter account, and we quickly corrected our error. We also insisted Jason use better judgment and discretion in public communications while affiliated with our brand.”

Kelly wasn't satisfied with Nickelodeon's apology: "Does that do it? It’s not like he made one comment that he can dial back,” she said on her show on Wednesday, adding that she was baffled by the fact that Nickelodeon would keep the actor around for his role on the Turtles reboot.

What's really baffling is the fact that Biggs was still attached to the Nickelodeon series at all after his wife, Jenny Mollen, tweeted a joke about her husband having sex with underage girls.

Celebrity Photos Of The Week:

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  • Celebrity Photos: May 2013

    Isla Fisher attended the Opening Ceremony and premiere of "The Great Gatsby" during the 66th Annual Cannes Film Festival at Palais des Festivals on May 15 in Cannes, France.

  • Celebrity Photos: May 2013

    Emma Stone stepped out in New York City on May 15 looking adorable as always.

  • Celebrity Photos: May 2013

    Leonardo DiCaprio, Carey Mulligan and Baz Luhrmann posed together at "The Great Gatsby" photocall at the 66th Cannes Film Festival on May 15.

  • Celebrity Photos: May 2013

    A very pregnant Penelope Cruz and her brother Eduardo visited their sister Monica at the hospital after she gave birth to a baby girl on May 14 in Madrid, Spain.

  • Celebrity Photos: May 2013

    Zoe Saldana looked incredible at the "Star Trek Into Darkness" premiere held at The Dolby Theatre in Hollywood, Calif., on May 14.

  • Celebrity Photos: May 2013

    Nicole Kidman arrived at the Martinez Hotel in Cannes, France to attend a photocall of the Jury on the eve of the 66th edition of the Cannes Film Festival on May 14.

  • Celebrity Photos: May 2013

    Katie Holmes was spotted on the set of "Mania Days" in New York City on May 14.

  • Celebrity Photos: May 2013

    Emma Watson arrived on a flight at the Nice Airport on May 14 to attend the upcoming 66th Annual Cannes Film Festival in France.

  • Celebrity Photos: May 2013

    Lea Michele attended the FOX 2013 Programming Presentation Post-Party at Wollman Rink Central Park in New York City on May 13.

  • Celebrity News: May 2013

    Angelina Jolie revealed that <a href="http://www.huffingtonpost.com/2013/05/14/angelina-jolie-double-mastectomy_n_3271514.html?utm_hp_ref=celebrity" target="_blank">she had a double mastectomy</a> after discovering she carried a cancer gene on May 14.

  • Celebrity Photos: May 2013

    Owl City's Adam Young took a snack break while helping launch the new OREO cookie "Wonderfilled" campaign in NYC on May 14.

  • Celebrity Photos: May 2013

    Alyson Hannigan was spotted leaving the AOL office after visiting The Huffington Post in New York City on May 13.

  • Celebrity News: May 2013

    Angie Everhart <a href="http://www.huffingtonpost.com/2013/05/13/angie-everhart-cancer-diagnosis_n_3267500.html" target="_blank">confirmed that she's been diagnosed</a> with thyroid cancer.

  • Celebrity Photos: May 2013

    Selma Blair was seen enjoying her Mother's Day with her son, Arthur Bleick at the beach in Malibu, Calif., on May 12.

  • Celebrity Photos: May 2013

    Jennifer Aniston and Justin Theroux took a stroll after shopping at Barney's and dining at Fred's Restraunt in New York City on May 12.

  • Celebrity Photos: May 2013

    Sienna Miller attended the Arqiva British Academy Television Awards at the Royal Festival Hall on May 12 in London.

  • Celebrity Photos: May 2013

    Reese Witherspoon flaunted her legs in short shorts while watching her son's football game in Brentwood, Calif., on May 11.

  • Celebrity Photos: May 2013

    Selena Gomez was spotted spending some time at the pool in Miami, Fla., on May 11.

  • Celebrity Photos: May 2013

    Halle Berry flaunted her baby bump at the 20th Annual EIF Revlon Run/Walk For Women held at the Los Angeles Memorial Coliseum in Los Angeles, Calif., on May 11.

  • Celebrity Photos: May 2013

    Liv Tyler took a walk with a male friend around West Village in New York City on May 10.

  • Celebrity Photos: May 2013

    Stephen Amell hosted the F*ck Cancer event on May 9 at Bootsy Bellows in Los Angeles, Calif.

  • Celebrity Photos: May 2013

    Pregnant actress Jenna Dewan headed out of her home in London on May 9.

  • Celebrity Photos: May 2013

    Kerry Washington stopped by "Extra" at The Grove in Los Angeles, Calif., on May 8.

  • Celebrity Photos: May 2013

    Bradley Cooper went incognito as he headed to the set of "American Hustle" on May 8 in Boston.

  • Celebrity Photos: May 2013

    Ryan Reynolds was spotted walking his dog Baxter while sporting the new Fitbit Flex Wireless Activity Wristband in Bedford, NY on May 7.

  • Celebrity Photos: May 2013

    Olivia Wilde was spotted rocking Carrera shades at Carrera Ignition Night in New York City on May 7.

  • Celebrity Photos: May 2013

    Jennifer Lopez and Casper Smart held hands while leaving their hotel in New York City on May 7. Check out J.Lo's tight leather pants!

  • Celebrity Photos: May 2013

    Blake Lively rocked thigh-high boots and a little black dress for a photo shoot in New York CIty on May 7.

  • Celebrity Photos: May 2013

    Jennifer Lawrence and Sarah Jessica Parker share a laugh while attending the "PUNK: Chaos To Couture" Costume Institute Gala at the MET Museum in New York City on May 6.

  • Celebrity Photos: May 2013

    Beyonce looked amazing at the "PUNK: Chaos To Couture" Costume Institute Gala at the MET Museum in New York City on May 6.

  • Celebrity Photos: May 2013

    Kristen Stewart wowed in a jumpsuit at the "PUNK: Chaos To Couture" Costume Institute Gala at the MET Museum in New York City on May 6.

  • Celebrity Photos: May 2013

    Nina Dobrev dazzled at the "PUNK: Chaos To Couture" Costume Institute Gala at the MET Museum in New York City on May 6.

  • Celebrity Photos: May 2013

    Gwen Stefani and Gavin Rossdale attended the "PUNK: Chaos To Couture" Costume Institute Gala at the MET Museum in New York City on May 6.

  • Celebrity Photos: May 2013

    Jessica Biel flashed her bra while she was out with her dogs for a walk on May 6 in New York City.

  • Celebrity Photos: May 2013

    Brooke Burke-Charvet and her son enjoyed Wendy`s new Frosty Waffle Cones in Los Angeles, Calif., on May 6.

  • Celebrity Photos: May 2013

    Kim Kardashian and Kanye West held hands on May 5 before heading to dinner in New York City.

  • Celebrity Photos: May 2013

    Joshua Jackson and Diane Kruger were seen walking together in SOHO in New York City on May 5.

  • Celebrity Photos: May 2013

    Josh Hartnett was snapped catching a cab in New York City on May 5.

  • Celebrity Photos: May 2013

    The crowd watched as Paris Hilton and her boyfriend River Viiperi shared a sweet kiss at the Pool After Dark at Harrah's Resort in Atlantic City on May 4.

  • Celebrity Photos: May 2013

    Orlando Bloom had his hands full during an afternoon outing in Beverly Hills, Calif., with 2-year-old son Flynn on My 4.

  • Celebrity Photos: May 2013

    Keith Urban carried 2-year-old daughter Faith while 4½-year-old Sunday Rose stuck close to mom Nicole Kidman as the family ventured out in Hollywood on May 4.

  • Celebrity Photos: May 2013

    LeAnn Rimes sported short shorts as she shopped in Los Angeles, Calif., on May 3.

  • Celebrity Photos: May 2013

    Nina Dobrev visited the Origins Flatiron store for the launch of the new Origins GinZing™ Energy-boosting on May 3 in New York City.

  • Celebrity Photos: May 2013

    Leonardo DiCaprio and Jay-Z partied with Moët & Chandon at the after party for the NY premiere of "The Great Gatsby" on May 1.

  • Celebrity Photos: May 2013

    Heidi Klum was spotted leading the "Right End" Hair Revolution at The Grove on May 1 in Los Angeles, Calif.

  • Celebrity Photos: May 2013

    Allison Williams rocked spandex as she filmed scenes for "Girls" in Chinatown, NYC, on May 1.

  • Celebrity Photos: May 2013

    LaLa Anthony provided some added comfort by donating Dr. Scholl's Massaging Gel Insoles to construction workers at the Seaside Heights boardwalk on May 1. The New Jersey town is working tirelessly on the rebuilding efforts after Hurricane Sandy.

  • Celebrity Photos: May 2013

    Hilary Duff donned a tight red dress as she headed into "The Today Show" in New York City on May 1.

  • Celebrity Photos: April 2013

    Amy Poehler hosted Worldwide Orphans Salon Event presented by Shutterfly on April 30 in Los Angeles, Calif.

  • Celebrity Photos: April 2013

    Nicole Richie attended the AOL 2013 Digital Content Newsfront at Moynihan Station in New York City on April 30.

  • Celebrity Photos: April 2013

    Kristin Cavallari arrived on a flight at LAX airport in Los Angeles, Calif., with her son Camden on April 30.