Alyson Hannigan pregnant Satyana

What better way to celebrate Mother's Day then with a posh party in Brentwood?

The pregnant American Reunion star came to the party bearing a big box of fruit, but she looks very ripe herself!

Hannigan is due to give birth this summer, and shared via Twitter this week, "I could be doing the math wrong but I think I'm in my 5th trimester."

We think so too, Alyson!