"The Big Bang Theory" star Kunal Nayyar, who plays Raj in the series, has recently named the celebrities he wanted to appear on the hit CBS sitcom, saying he would love to have Lisa Kudrow as Penny's mother.

Nayyar plays the speechless-around-women-when-sober astrophysicist Rajesh Ramayan "Raj" Koothrappali.

Speaking to Digital Spy, the actor also revealed he wishes Betty White to play Sheldon's beloved "meemaw."

Nayyar talked more of his TBBT episode wish list. He said he favors a "Game of Thrones" episode, which is only appropriate for the geeky characters in the series.

Asked to comment on the story development among the characters in the series, Nayyar noted the characters are "getting older."

"These characters, they have to evolve. They're getting older on the show, these are things that happen in everyone's life. People do get married... this is just a natural evolution. I wonder if we'll have Big Bang babies in the season finale?"

Would there be a baby for Bernadette and Howard?

In a separate interview, Melissa Rauch (who plays Bernadette Rostenkowski) said her character will be consistent on her decision to not have babies. Will Howard (Simon Helberg) manage to change Bernadette's mind? Or is it more possible for Penny (Kaley Cuoco) to get knocked up?

Lisa Kudrow as Penny's mother?

In a much earlier interview, Cuoco has shared her wish to have the former 'Friends' star Lisa Kudrow as her character's mother in 'Big Bang.'

"Every week we hear something whacked about Penny's family... She has this weird family and I've been waiting for the episode [in which they could appear]. My ideal mother would be Lisa Kudrow. I just think she should play my mother. I have this idea that she had me when she was really young," Cuoco said.

What's your take on that, Ms Lisa Kudrow? Fans know it would be totally hilarious to see Kudrow swap punchlines with Cuoco and the rest of the 'Big Bang' cast.

"The Big Bang Theory" returns to the U.S. for its sixth season on September 27 via CBS.

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