Who says St. Patrick's Day can't extend into a week?
Because Alyson Hannigan shined in green on the American Reunion red carpet Monday night… literally!
Her shimmery mini-dress stood out in the crowd as the American Pie cast all reunited for their last (or so they say) big hoorah.
We're always amazed when pregnant women can work heels like that.
Get it, girl!
[Image via Nikki Nelson/WENN.]