Celebrity Couples You Didn't Realize Were Together

You, too, will be shocked when you look through these photos of celebs you probably didn't realize were dating.

From BuzzFeed: "Friends" star Matthew Perry has been with "Mean Girls" actress Lizzy Caplan for some time. Though we're not sure exactly how they got together -- or what makes their relationship tick -- they didn't make their public debut until the US Open a year ago.