Hilary Duff: Aching from Laughter After 'This is the End'

Hilary Duff flashes a smile as she carries her baby boy Luca while heading to Babies First Class on Wednesday (June 19) in Sherman Oaks, Calif.

The 25-year-old actress waved to photographers as she made her way back to her car after dropping off her 14-month-old son.

PHOTOS: Check out the latest pics of Hilary Duff

“My belly is still aching from laughter,” Hilary tweeted along with a pic of her movie ticket after watching This is the End.

FYI: Hilary is wearing a Sandro top.

10+ pictures inside of Hilary Duff and Luca at Babies First Class…