05/03/2012 01:03 pm ET

Alyson Hannigan Pregnant: Actress Tweets About Baby Bump

During Jessica Simpson's seemingly never-ending pregnancy, there was no contest for the title of Hollywood's biggest baby bump. But now that she's finally given birth to Maxwell Drew Johnson, it's time for someone else to claim the honor. Alyson Hannigan did just that Tuesday, tweeting:

Though Hannigan told Rachael Ray that she's not due until June, recent photos reveal that she's a formidable contender for the "biggest bump" prize. This will be child No. 2 for the "American Reunion" actress; she and husband Alexis Denisof have a 3-year-old daughter, Satyana.

Hannigan, 38, may have accidentally revealed her baby's sex during her appearance on "The Rachael Ray Show" in April. "The other night, she -- this, you know," Hannigan said, when beginning an anecdote. She went on to describe how her baby frequently moves around, telling Ray, "I feel like a popcorn popper!"

And as for Satyana, Hannigan told MSN in February that the little girl is psyched for a new sibling:

"Oh, she's super, super excited!" she said. "She is already a great big sister, and she's very excited about the baby. She rubs lotion on my belly and talks to the baby, and it's very sweet."

See what other stars are expecting to give birth in 2012:

Celebrity Babies On The Way