Keith Carradine has appeared in two episode as Penny's father, Wyatt, starting in Season 4.
Prior to THE BIG BANG THEORY, Kaley Cuoco was best known to television audiences for her role as Bridget Hennesy in the series “8 Simple Rules.” Her other television credits include a recurring role on “Charmed,” and guest appearances on “Complete Savages,” “Prison Break,” “My So-Called Life,” “Northern Exposure” and “Ladies Man.” Cuoco starred in the cable movies “Fat Like Me,” "Crimes of Fashion" and “The Hollow,” and was seen in the miniseries “10.5.” Her other television movie credits are “Alley Cats Strike,” “Toothless,” “Attack of the 50 Ft.
At the start of season 8, Sheldon makes a grand return back home after trying to run away to clear his head with a train trip.
Laura Spencer, who plays Raj's girlfriend Emily Sweeney, was promoted to a semi-regular during the ninth season. Wolowitz in numerous episodes from 2007 until 2014 when she passed away following a short illness. Aarti Mann had a recurring role as Priya, Raj's sister who had a relationship with Leonard, during the show's fourth and fifth season.
Wil Wheaton has appeared in thirteen episodes as a fictionalized version of himself, initially acting as an enemy to Sheldon, since the third season.
Three-time Emmy nominee Mayim Bialik plays Amy Farrah Fowler, a scientist who is involved with Sheldon. Although Amy and Sheldon have definitely progressed in their relationship (they even kiss now!
), they're still taking it very, very slowly as season 8 begins.
According to People, Cuoco has wed boyfriend and tennis pro Ryan Sweeting.
On Wednesday, she posted a picture of herself on Instagram, decked in a pink Vera Wang gown, and kissing Sweeting with the caption: "Yep :) #thesweetings." The pair had a whirlwind romance, getting engaged after just three months of dating.Woman,” “Growing Up Brady,” and the miniseries, “Dean Koontz's Mr.Murder.” Additionally, Cuoco lent her voice to the animated series “Brandy and Mr.Cuoco, left, plays Penny, a waitress who can't quite match wits with her group of friends but nevertheless hangs out with them.In season 8, Cuoco's new haircut won't be the only change for Penny, who's embarking on a career as a pharmaceutical sales rep with help from Bernadette (Melissa Rauch, right).Kunal Nayyar plays Rajesh Ramayan "Raj" Koothrappali, a shy astrophysicist who up until recently could only talk to women after he drank alcohol.