11 Celebrities you had no idea were related

1. Nicole Richie and Cameron Diaz

The pair are sisters-in-law, after Diaz married Benji Madden in 2015.

2. Casey Affleck and Joaquin Phoenix 

Affleck and Phoenix were brothers-in-law, until the Manchester By The Sea actor separated from Phoenix's sister, Summer, in 2017.

3. Emily Blunt and Stanley Tucci 

The Devil Wears Prada costars are sister-and-brother-in-law, as Tucci is married to Blunt's sister, Felicity.

4. Sofia Coppola and Jason Schwartzman

Schwartzman and Coppola are first cousins.

5. Al Roker and Lenny Kravitz 

They are first cousins once removed.

6. Melissa McCarthy and Mark Wahlberg 

The pair are cousins-in-law.

7. Ashlee Simpson and Diana Ross

Ross is Simpson's mother-in-law. Ashlee married the singer's son, Evan Ross back in 2014.

8. Dakota Johnson and Antonio Banderas

The Fifty Shades of Grey actress is Antonio Banderas' former stepdaughter. Banderas separated from Dakota's mother, Melanie Griffith in 2015.

9. Brandy and Snoop Dogg

Brandy and Snoop Dogg are actually first cousins.

10. Lily Allen and Alfie Allen 

The Game of Thrones star is the brother of pop-singer, Lily Allen

11. Rob Lowe and Hilary Swank 

The pair were formerly brother-and-sister-in-law. Lowe's brother, Chad Lowe, was married to the actress for ten years before they split in 2007.