New mom Hilary Duff loves showing off her 4-and-a-half-month-old son, Luca.
The 24-year-old singer and actress has been sharing her pride and joy's every milestone with her Twitter followers and it looks like little Luca is now teething.
"Luca is cutting a tooth!!! It's the cutest/saddest (because it hurts) getting so big my boy!! Gunna have a little toof lol," Duff tweeted last week to her 1.5 million followers.
Earlier this month, Duff also posted a photo of her little man in his pre-teething stage, chewing on a "Tasty toy."
Duff is clearly in heaven documenting Luca's every move, but there's also some sad news. The former Disney star tweeted that she stopped tweeting for a few days since her other baby -- her dog Lola -- is sick again.
"Hi!I've abandoned my twitter 4 a few days.Lola got very sick again and it's been very hard:( pray for my girl,i get to bring her home today," she wrote on Aug. 9.
In February, Duff revealed that her Chihuahua had been having "terrible seizures" and had to have a shunt inserted in her skull in order to drain fluid from her brain. It seems that months later, her poor dog still hasn't fully recovered.
Although Duff is busy taking care of her family at home, she's also rumored to be back to work. In July, she was photographed in the recording studio with producer Mitch Allan and songwriter Ali Tamposi, and is thought to be recording new music to follow her 2007 album, "Dignity."
2014 MusiCares Person Of The Year Honoring Carole King - Red Carpet
LOS ANGELES, CA - JANUARY 24: Actress/singer Hilary Duff attends 2014 MusiCares Person Of The Year Honoring Carole King at Los Angeles Convention Center on January 24, 2014 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for NARAS)
Delta Air Lines Toasts 2014 GRAMMY Weekend With Lorde, 2014 GRAMMY Nominee
WEST HOLLYWOOD, CA - JANUARY 23: Actress Hilary Duff joins Delta Air Lines in toasting 2014 GRAMMY Weekend with private reception and performance from Lorde, four-time 2014 GRAMMY award nominee in West Hollywood, CA on January 23rd 2014 (Photo by Angela Weiss/Getty Images for Delta Air Lines)
Fresh-Tops #SELENATORHEAVEN Selena Gomez Concert Viewing Party At Hyde Lounge Staples Center
LOS ANGELES, CA - NOVEMBER 06: Actress Hilary Duff attends the Fresh-Tops #SELENATORHEAVEN Selena Gomez concert viewing party at Hyde Lounge Staples Center at The Staples Center on November 6, 2013 in Los Angeles, California. (Photo by Jason Merritt/Getty Images for Fresh-Tops)
Around Bryant Park - Day 3 - Spring 2010 MBFW
NEW YORK - SEPTEMBER 12: Actress Hilary Duff attends Mercedes-Benz Fashion Week at Bryant Park on September 12, 2009 in New York, New York. (Photo by Brian Ach/Getty Images)
Hilary Duff Lights The Empire State Building In Honor Of People With AIDS
NEW YORK - MAY 14: Actress Hilary Duff lights the The Empire State Building on May 14, 2009 in New York City. (Photo by Bryan Bedder/Getty Images)
Herve Leger By Max Azria Collection Launch Party
WEST HOLLYWOOD, CA - MAY 06: Actress Hilary Duff arrives at the Herve Leger by Max Azria Collection Launch party held at Live! on Sunset on May 6, 2009 in West Hollywood, California. (Photo by Alberto E. Rodriguez/Getty Images)
1st Annual Night To Make A Difference At Mr. Chow
BEVERLY HILLS, CA - FEBRUARY 22: Hilary Duff attends the 1st Annual Night To Make a Difference At Mr. Chow on February 22, 2009 in Beverly Hills, California (Photo by John M. Heller/Getty Images)
MTV's TRL "Total Finale Live" - Press Room
NEW YORK - NOVEMBER 16: Musician/actress Hilary Duff attends MTV's TRL 'Total Finale Live' at the MTV studios in Times Square on November 16, 2008 in New York City. (Photo by Bryan Bedder/Getty Images)
Cartier's Third Annual Loveday Celebration
LOS ANGELES, CA - JUNE 18: Singer/actress Hilary Duff (L) and New York Islander hockey player Mike Comrie arrive at the third annual Loveday celebration and Cartier Love Charity Bracelet launch held at a private residence on June 18, 2008 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
The Metropolitan Museum Of Art Costume Institute Annual Gala - Arrivals
NEW YORK - MAY 05: Actress/singer Hilary Duff arrives at the Metropolitan Museum of Art Costume Institute Gala, Superheroes: Fashion and Fantasy, held at the Metropolitan Museum of Art on May 5, 2008 in New York City. (Photo by Stephen Lovekin/Getty Images)
MTV TRL Presents Hilary Duff & Estelle
NEW YORK - APRIL 29: (U.S. TABS OUT) Musician Hilary Duff appears backstage during MTV's Total Request Live at the MTV Times Square Studios on April 29, 2008 in New York City. (Photo by Andrew H. Walker/Getty Images)
Premiere Of "War, Inc." At The 2008 Tribeca Film Festival
NEW YORK - APRIL 28: Actress Hilary Duff attends the premiere of 'War, Inc.' during the 2008 Tribeca Film Festival on April 28, 2008 in New York City. (Photo by Scott Wintrow/Getty Images for Tribeca Film Festival)
Los Premios MTV Latin America 2007 - Show
MEXICO CITY - OCTOBER 18: Singer Hilary Duff performs onstage during the Los Premios MTV Latin America 2007 at the Palacio De Los Deportes October 18, 2007 in Mexico City, Mexico. (Photo by Kevin Winter/Getty Images)
Hilary Duff In Concert At The Palms In Las Vegas
LAS VEGAS - AUGUST 18: Singer/actress Hilary Duff performs at The Pearl concert theater at the Palms Casino Resort on August 18, 2007 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
CosmoGIRL! Magazine Hosts Annual Born To Lead Awards
NEW YORK - NOVEMBER 08: Singer Hilary Duff attends the Cosmo Girl! magazine celebration for it's annual Born to Lead awards on November 8, 2005 in New York City (Photo by Peter Kramer/Getty Images)
Hilary Duff's 18th Birthday Party
HOLLYWOOD - SEPTEMBER 28: Actress Hilary Duff arrives to her 18th Birthday Party at Club Mood on September 28, 2005 in Hollywood, California. (Photo by Matthew Simmons/Getty Images)
Z100 Jingle Ball 2004 - Press Room
NEW YORK - DECEMBER 10: Singer Hilary Duff poses backstage at the Z100 Jingle Ball 2004 at Madison Square Garden December 10, 2004 in New York City. (Photo by Evan Agostini/Getty Images)
Premiere of New Lines' "Raise Your Voice" - Arrivals
UNIVERSAL CITY, CA - OCTOBER 3: Actress Hilary Duff arrives at the premiere of New Lines' 'Raise Your Voice' at the Loews Universal Theatre on October 3, 2004 in Universal City, California. (Photo by Kevin Winter/Getty Images)
The 2003 Rising Stars Gala
CENTURY CITY, CA - NOVEMBER 14: Actress Hilary Duff attends The 2003 Rising Stars Gala held on November 14, 2003 at The Century Plaza Hotel & Spa, in Century City, California. (Photo by Giulio Marcocchi/Getty Images)