It may have taken the show nine series, but The Big Bang Theory has finally announced the casting of Leonard’s dad, and unsurprising to fans of the show about sci-fi fans, he’s to be played by Independence Day star Judd Hirsch.

The announcement was made on Wednesday at the PaleyFest panel in LA, with Johnny Galecki – who plays Leonard on the show – sharing the good news. He also says he had a hand in the casting, as after meeting Hirsch he said “he’s a hero of mine and I knew that he was a hero of Chuck Lorre and Bill Prady’s [the producers behind the show] so I just accosted him and cornered him and practically made him commit on the spot to play my father. I’m really excited about it. It’s going to be a lot of fun.”

What we’re taking from this is that you always say yes to Leonard.

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Though the character of Leonard’s dad has not yet made an appearance on the show, what we do know about him is that he is an anthropologist, and that he and Leonard’s mum are divorced following him cheating on her.

We also know that the two have never been overly affectionate towards each other, which could lead to some serious drama once he finally does make his appearance.

Speaking about the future of the show, executive producer Steve Molaro recently mentioned in an interview with Entertainment Tonight that it doesn’t look like the family reunions will stop there; “There’s so many family members that we haven’t met yet. Penny’s Mom, Leonard’s dad, Penny’s brother — which is a great one that I’m interested in — Sheldon’s brother, and Howard’s dad is floating around out there.”

It may have reached season nine, but it looks like The Big Bang Theory still has many lightyears to still travel.