Alberto Frezza
Alberto Frezza will play the role of Ryan in the upcoming “Grey’s Anatomy” firefighter spinoff. Pictured: Frezza arrives at the 65th Primetime Emmy Awards Performer Nominee Reception at the Pacific Design Center on Sept. 20, 2013 in West Hollywood, California. Getty Images/Kevin Winter

The main cast of the upcoming “Grey’s Anatomy” firefighter spinoff is now complete!

According to TV Line, “Dead of Summer” alum Alberto Frezza has just been cast as the last series regular for the ABC series. Frezza will play the role of Ryan, but other details regarding the character are still being kept under wraps.

Earlier this month, ABC announced the casting of five series regulars, namely, Grey Damon, Jay Hayden, Barrett Doss, Okieriete Onaodowan and Danielle Savre. The yet to be titled “Grey’s Anatomy” spinoff will also feature Jason George’s character, Dr. Ben Warren, according to Deadline.

In the previous episode of Shonda Rhimes’ hit TV series, Ben has already started training for his upcoming gig. He broke the news to Jo (Camilla Luddington), but did not give the exact details. Ben told his colleague that he is gearing up for something, but has not told his wife, Dr. Bailey (Chandra Wilson), about it.

While speaking with TV Line, George said that he’s confident Bailey will understand Ben’s decision, but not after the couple has a discussion about it. The actor is also hopeful Ben and Bailey could reunite in “Grey’s Anatomy” or in the spinoff by featuring them in their home together.

George is also confident that crossovers between the two shows will take place in the future, just like what was done between “Grey’s Anatomy” and “Private Practice.” The latter has been canceled after only six seasons.

“Bailey can come home and fall into bed, and there’s Ben, and they can talk about their day. Or Ben comes home from fighting fires all day and falls into bed, and there’s Bailey. I’ve come to really love their relationship. I’m proud of it. They’re grown-ass people with grown-ass problems who work it out no matter what,” he told TV Line.

The firefighter TV series has been picked up by the network for 10 episodes. Before the show officially premieres, the characters will first be introduced in the fall episode of “Grey’s Anatomy” Season 14. The spinoff will be produced and executive produced by Emmy-winning director, Paris Barclay.