Variety reported that contract negotiations on the deals began this week.Us Weekly has reached out to Warner Bros., CBS and Bialik’s representatives for comment.Attendees were treated to a blooper that went awry from an earlier season, where Cuoco and Galecki chose to prank their co-stars and crew by taking a dinner fight scene to another level."We thought it would be really funny for the gag reel to take it really far," Cuoco said of the physical prank that ended with her falling off a chair and getting clocked in the head.(Photo by C Flanigan/Getty Images)BURBANK - JULY 23: Gallery Promo Coverage of CBS' THE BIG BANG THEORY, scheduled to air on the CBS Television Network. (Photo by Monty Brinton/CBS via Getty Images)BEVERLY HILLS, CA - DECEMBER 18: Actress Kaley Cuoco-Sweeting arrives at The PEOPLE Magazine Awards at The Beverly Hilton Hotel on December 18, 2014 in Beverly Hills, California.(Photo by Jon Kopaloff/Film Magic)NEW YORK - MAY 18: CBS announces their new fall schedule. Staab/CBS via Getty Images) *** CBS presented its 2016-17 prime time schedule today (May 18) at Carnegie Hall, where many of the Networks new and returning series stars were in attendance.(Photo by Michael Yarish/CBS via Getty Images) HOLLYWOOD, CALIFORNIA - MARCH 16: (L-R) Moderator Alie Ward, executive producers Chuck Lorre, Steven Molaro, Bill Prady, actors Mayim Bialik, Jim Parsons, Kaley Cuoco, Johnny Galecki, Simon Helberg, and Kunal Nayyar attend The Paley Center For Media's 33rd Annual PALEYFEST Los Angeles ÃThe Big Bang Theory' at Dolby Theatre on March 16, 2016 in Hollywood, California.
Meanwhile, Howard (Simon Helberg, left) and Bernadette (Melissa Rauch, right) spend the weekend with Mrs. 17 ( -Â PM, ET/PT) on the CBS Television Network.
Also pictured: Johnny Galecki (right) (Photo by Monty Brinton/CBS via Getty Images) LOS ANGELES - APRIL 15: 'The Gorilla Dissolution' -- Howard (Simon Helberg, left) and Bernadette (Melissa Rauch, right) struggle to care for Mrs.