Ashton Kutcher & Mila Kunis Kiss on the Fourth of July!

Ashton Kutcher and Mila Kunis share a sweet kiss while attending an Independence Day party on Wednesday (July 4) in Los Angeles.

The former That 70′s Show co-stars have been keeping mum on their secret romance though they have recently been semi-open about their PDA. The couple was spotted cuddling while having lunch at the Soho House late last month.

PHOTOS: Check out the latest pics of Mila Kunis

Mila, 28, stopped by a local Starbucks on Thursday (July 5) before heading to a Pilates class sporting a bandage on her left big toe.

More pics of Mila and Ashton at X17.

25+ pictures inside of Mila Kunis heading to Pilates class…