Actor, composer, director. Biggest role was Growing Pains (bigger in the US than UK, the show that Kirk Cameron and Leo DiCaprio got started on). He hosted America's funniest videos for a long time. (I suspect you don't get that in UK) He does a lot of voicing for documentaries, I'm sure you've heard him in some. His voice will sound familiar to you even if his name/face wouldn't. Did a lot of things like New Year specials. Did a lot of cameos in movies and other sit coms. Had his own talk show. Mostly famous for being a famous Canadian though. (a trope "how I met your mother" played off a lot) Real nice, honest down to earth guy. Nowadays famous to the kids for being Robin Thicke's father.
Robin Thicke is some crappy pop singer who Miley Cyrus gyrated her buttocks against his on live TV a few years ago. And before you ask, Miley Cyrus is a once pretty little girl actress who turned into an ugly demonic two-bagger, awful sounding pop singer when she became an older teen.
i thought it was more because he made a music video with emily ratajowski who got her baps out throughout the whole video. She's one of my faves (seen her in gone girl yum)