Jon appeared in 11 episodes of the first season and was first introduced as Jack's (Ventimiglia) best friend Miguel, reported Ace Showbiz.
Miguel later has been at the center of the series' one of the biggest secrets. People are wondering how Miguel and Rebecca (Mandy Moore) got together after Jack's death.
Alexandra, meanwhile, guest-starred in 5 episodes in the first season of the series. She played Sophie, Kate's (Chrissy Metz) childhood best friend and Kevin's (Justin Hartley) childhood crush and New York-based ex-wife.
Previously, creator Dan Fogelman revealed that season 2 premiere would hold "a huge piece of the puzzle" regarding Jack's death.