Just, wow! There have been many swirling rumors that The Big Bang Theory may end after this upcoming season. And if that's the case, the hit sitcom truly is going out with a bang! After 9 seasons, we're going to finally meet a few more members of Penny's family in Season 10. And the producers have gone all out in securing just the right mother and brother for Kaley Cuoco's character.

When it comes to Katey Sagal, she is perhaps best known as mother Peggy Bundy on the iconic sitcom Married...With Children, which had an unprecedented 11 season run run from 1987 until 1997. She is also well-known for playing the iconic character Gemma Teller Morrow on the hit FX drama Sons of Anarchy for Seven Seasons. What some fans might not known is that she actually starred as Kaley Cuoco's mother on the ABC sitcom 8 Simple Rules for Dating My Teenage Daughter (which, in its third and final season became known as 8 Simple Rules). That show ran between 2002 and 2005, coming to an end after the untimely death of leading man John Ritter. Now, The Big Bang Theory Season 10 is set to give us the 8 Simple Rules reunion we've been waiting for.

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Yes, in the new episodes debuting this fall, Katey Sagal will once again play Kaley Cuoco's on-screen mother. And this will mark the first time we've ever seen Penny's mom on screen. Katey Sagal will star as Susan, it was announced Friday at Comic-Con during the show's writers' panel. Susan is described as such.

"[She is] stressed out and neurotic from a life with her troubled son."

And guess who will be playing that son? According to Deadline, another sitcom veteran, that's who! Yes, 30 Rock alum Jack McBrayer will be playing slightly against type as former drug dealer and ex-con Randall. Though it should be noted that McBrayer is being asked to bring his cheerful, always sunny demeanor to the role for what should prove to be one likable ex-junkie. In previous episodes of Big Bang, we have been introduced to Penny's likable Dad Wyatt, played by Keith Carradine.

Katey Sagal is also known for her voice work on the iconic Fox animated sitcom Futurama, and is an established singer. Jack McBrayer most recently teamed up with Triumph the Insult Comic Dog for the Cartoon Network Adult Swim sitcom The Jack and Triumph Show. He also appeared on the IFC sitcom Increasingly Poor Decisions of Todd Margaret, along with The Middle and several episodes of Drunk History. Both Sagal and McBrayer will be making their debut on The Big Bang Theory Season 10 Season Premiere, which debuts on CBS Monday, September 19.