(Cover) - EN Showbiz - Alyson Hannigan has denied she is pregnant.

The How I Met Your Mother star was seen at the Malibu Chili Cook Off over the weekend with her husband Alexis Denisof and two-year-old daughter Satyana.

She appeared to be sporting a baby bump underneath her baggy clothes, but the 37-year-old shared with fans that she had maybe eaten too much over the Labor Day weekend.

"NO, I'm not pregnant!" Alyson tweeted. "I just ate too much carnival food, that time of the month, hurt my back & couldn't suck my gut in, and need to do cardio!"

Alyson was refreshingly frank about the unflattering image that started the rumours she was expecting her second child.

"And I'm NEVER gonna wear that shirt again!!!" she said jokingly before adding, "I do LOOK pregnant in that photo!"

Alyson has reunited with the cast of American Pie and will be seen in the fourth installment of the hit movie franchise next year. (C) Cover Media