Ashton Kutcher & Mila Kunis -- The FRIENDLY Sushi Dinner Date

While her rep says they're just friends, Mila Kunis was spotted platonically hanging out with Ashton Kutcher in L.A. on Sunday.

The former "That '70s Show" stars were seen getting into Ashton's car following a fancy sushi dinner in Studio City ... with Mila attempting to shield her face from the cameras.