
Alyson Hannigan has already joked that she has the biggest baby bump in Hollywood since Jessica Simpson gave birth. Now the heavily pregnant star has joked again about the huge size of her baby belly.
Alyson – who is expecting her second child with her Buffy The Vampire Slayer former co-star husband Alexis Denisof – took to Twitter to tell fans that she getting so big she reckons she’s actually in her fifth trimester,
“I could be doing the math wrong but I think I'm in my 5th trimester,” she wrote on the social networking site.
The How I Met Your Mother star is due to give birth in June, and she may have let slip that she’s expecting a little sister for her daughter Satyana, as she accidentally referred to her overactive bump as a ‘she’ during a TV interview,

“The other night, she - this, you know…I feel like a popcorn popper!”
As for big sister Satyana, she’s looking forward to welcoming the new baby, with Alyson revealing she’s been helping to take care of her mum's bump,
“She's super, super excited! 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.”
Aww, so cute!