8 Famous Friends Who Are Also In-Laws

Emily and Stanley became friends after costarring together in the 2006 film The Devil Wears Prada, and six years later, they became sister- and brother-in-law when the actor married Emily's older sister, Felicity. In an interview with Variety in 2016, Emily opened up about their relationship, saying, "Stanley is in my actual family. How frightening is that? He's married to my sister." Stanley met Felicity at Emily's 2010 wedding to John Krasinski and he never would have received an invitation if he hadn't played Nigel. "All thanks to The Devil Wears Prada," Emily said.

Cameron and Nicole became sisters-in-law when they married brothers Benji and Joel Madden, respectively. Nicole married Joel in 2010 and Cameron and Benji tied the knot five years later, but the two were actually friends before then. Nicole participated in throwing Cameron a surprise party for her 41st birthday in 2014 and even took full credit for playing matchmaker between Cameron and Benji Madden. "I'm going to take responsibility for everything! I am a devoted sister-in-law. I'm happy for anyone who is happy, and I want everyone to be surrounded with love," she said during a 2014 appearance of Watch What Happens Live.

These two are brothers-in-law through Casey's 2006 marriage to Joaquin's sister, Summer, but their friendship actually formed after they costarred together in the 1995 movie To Die For. Casey spoke about their close bond during the Telluride Film Festival in 2016, saying, "We became close friends on To Die For and I think we just share a sense of humor. I directed a movie that he was in [I'm Still Here], which we both thought was very funny and no one else really did, but there were a lot of strange reactions to it . . . I also married his sister, but we were bonded and I think sort of rediscovered a very unique sense of humor . . . You just have to just avoid him every few months every now and again. But he's always excellent."

While Reba and Kelly are no longer related (Reba split from Narvel Blackstock in 2015), Kelly became Reba's daughter-in-law after she married Reba's stepson, Brandon Blackstock, in 2013. Kelly grew up listening to Reba's music, and in 2002, she was given the opportunity to sing a duet with her idol. After they performed "Does He Love You" on American Idol, the duo maintained a friendship and even teamed up for the 2 Worlds 2 Voices tour in 2008.