In a recent interview with GQ, the Ted star was asked which of his co-stars was the most fun to be mean to. "Will Ferrell," the 51-year-old replied, insisting that Will "loves" to be made fun of. "Working with Will, we just laugh every day and he just genuinely likes to make people laugh," Mark said of his The Other Guys co-star. "His comedy comes from a nice place and he's a sweet, sweet guy. And so, to give him c**p? I remember even in promoting the movie we had lots of fun."