Blake Lively is actually related to one of the cast members, but before you go thinkin' it's Zac Efron or Vanessa Hudgens... think ~daddy~. Yep, Coach Bolton.
Bart Johnson is married to Blake's older sister, Robyn Lively, and they have three kids together: Kate, Baylen and Wyatt.
The proof is in the Instagram!
The more you know.