Who is Melissa Joan Hart dating? Who Melissa Joan Hart dated; list of Melissa Joan Hart loves, ex boyfriends; breakup rumors. The loves and relationships of Melissa Joan Hart, listed by most recent. Melissa Joan Hart has been married for some time now, but wouldn't it be scandalous if the star of Clarissa Explains it All ended up having a celeb sex tape floating around somewhere? Past flame Adrian Grenier isn't on the list of celebrities with sex tapes, but in Hollywood anything can happen (and end up as a celebrity sex tape).