These two "friends" are still hanging out and spending LOTS of time together, according to our photographer ...

One of our shooters saw Mila Kunis arrive at Ashton Kutcher's house Friday afternoon and didn't see either emerge until today, when they shared a ride on Ashton's motorcycle!

After the ride, Mila grabbed a coffee and smoothed her helmet hair. Not even a helmet can ruin this girl's good looks and we think Ashton's taken notice!