Actors Johnny Galecki and Kaley Cuoco attend The 23rd Annual Critics' Choice Awards at Barker Hangar on January 11, 2018 in Santa Monica, California.
Johnny Galecki attends the Academy of Motion Picture Arts and Sciences 30th Anniversary Screening of "National Lampoons Christmas Vacation" at the...
Actors Johnny Galecki and Kaley Cuoco attend the People's Choice Awards 2016 at Microsoft Theater on January 6, 2016 in Los Angeles, California.
Actors Johnny Galecki and Kaley Cuoco attend the Entertainment Weekly Celebration of SAG Award Nominees sponsored by Maybelline New York at Chateau...
Johnny Galecki attends the series finale party for CBS' "The Big Bang Theory" at The Langham Huntington, Pasadena on May 01, 2019 in Pasadena,...
Actor Johnny Galecki and actress Kaley Cuoco attend the People's Choice Awards 2016 at Microsoft Theater on January 6, 2016 in Los Angeles,...
The Hot Tub Contamination" -- Pictured: Penny and Leonard Hofstadter . Leonard and Penny must separate a quarreling Sheldon and Amy when their...
Johnny Galecki attends the series finale party for CBS' "The Big Bang Theory" at The Langham Huntington, Pasadena on May 01, 2019 in Pasadena,...
Johnny Galecki at premiere of 'Being John Malkovitch' at Havard Club, New York, New York, October 1, 1999.
Actor Johnny Galecki attends a screening of "Rings" at Regal LA Live Stadium 14 on February 2, 2017 in Los Angeles, California.
The Viewing Party Combustion" --Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a...
Johnny Galecki and Kaley Cuoco attend People and EIF's Annual Screen Actors Guild Awards Gala at The Shrine Auditorium on January 30, 2016 in Los...
Actors Johnny Galecki and Kaley Cuoco attend the People's Choice Awards 2016 at Microsoft Theater on January 6, 2016 in Los Angeles, California.
Actors Kaley Cuoco-Sweeting and Johnny Galecki attend The 41st Annual People's Choice Awards at Nokia Theatre LA Live on January 7, 2015 in Los...
Actors Kaley Cuoco and Johnny Galecki arrive at 21st Annual "A Night At Sardi's" gala benefiting the Alzheimer's Association - Arrivals at The...
Johnny Galecki speaks onstage during the 26th annual Race to Erase MS on May 10, 2019 in Beverly Hills, California.
Johnny Galecki, Beverly D'Angelo, Juliette Lewis and Chevy Chase as the Griswold family in National Lampoon's Christmas Vacation.
Actor Johnny Galecki attends the 22nd Annual Screen Actors Guild Awards at The Shrine Auditorium on January 30, 2016 in Los Angeles, California.
Johnny Galecki at premiere of 'Being John Malkovitch' at Havard Club, New York, New York, October 1, 1999.
Portrait of, from left, American actors Chevy Chase, Juliette Lewis , Beverly D'Angelo, and Johnny Galecki in the film 'National Lampoon's Christmas...
Actors Jim Parsons, Johnny Galecki, Kaley Cuoco, Simon Helberg and Kunal Nayyar pose in the press room during the People's Choice Awards 2010 held at...
The Creepy Candy Coating Corollary" -- While Sheldon settles a score with his nemesis, Wil Wheaton, Wolowitz begs Leonard to get Penny to set him up...
Actor Johnny Galecki arrives at the 61st Primetime Emmy Awards held at the Nokia Theatre on September 20, 2009 in Los Angeles, California.
Actor Johnny Galecki attends the 2017 CMT Music Awards at the Music City Center on June 7, 2017 in Nashville, Tennessee.
Actors Kaley Cuoco and Johnny Galecki attend The Paley Center For Media's 33rd Annual PALEYFEST Los Angeles ÔThe Big Bang Theory' at Dolby Theatre on...
Kaley Cuoco, Johnny Galecki, Melissa Rauch, Kunal Nayyapose, Simon Helberg Steven Molaro, Jim Parsons, Mayim Bialik, Chuck Lorre and Bill Prady of...
Actor Johnny Galecki and actress Kaley Cuoco pose in the press room at the 2016 People's Choice Awards at Microsoft Theater on January 6, 2016 in Los...
Actors Johnny Galecki and Kaley Cuoco attend the People's Choice Awards 2016 at Microsoft Theater on January 6, 2016 in Los Angeles, California.
Actor Johnny Galecki and actress Kaley Cuoco attend the People's Choice Awards 2016 at Microsoft Theater on January 6, 2016 in Los Angeles,...
Actors Mayim Bialik, Kunal Nayyar, Melissa Rauch, Johnny Galecki, Kaley Cuoco and Jim Parsons of The Big Bang Theory pose in the CBS/People's Choice...
Actor Johnny Galecki and host Kaley Cuoco attend the 39th Annual People's Choice Awards at Nokia Theatre L.A. Live on January 9, 2013 in Los Angeles,...
Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik and Melissa Rauch from the cast of "The Big Bang Theory" attend...
The Stockholm Syndrome" - Pictured: Bernadette , Howard Wolowitz , Penny and Leonard Hofstadter . Bernadette and Wolowitz leave their kids for the...
Johnny Galecki during 2003 Sundance Film Festival - "Bookies" - Portraits at Yahoo Movies Portrait Studio in Park City, Utah, United States.
Johnny Galecki attends the Academy of Motion Picture Arts and Sciences 30th Anniversary Screening of "National Lampoons Christmas Vacation" at the...
The Neonatal Nomenclature" - Pictured: Leonard Hofstadter . When Bernadette won't go into labor, all her friends try different tactics to get things...
Actor Johnny Galecki attends The 23rd Annual Critics' Choice Awards at Barker Hangar on January 11, 2018 in Santa Monica, California.
Actor Johnny Galecki attends the 2017 CMT Music Awards at the Music City Center on June 7, 2017 in Nashville, Tennessee.
Actor Johnny Galecki attends the 2017 CMT Music Awards at the Music City Center on June 7, 2017 in Nashville, Tennessee.
Johnny Galecki attends the 2017 CMT Music Awards at the Music City Center on June 7, 2017 in Nashville, Tennessee.
The Comic-Con Conundrum" -- Pictured: Sheldon Cooper , Amy Farrah Fowler , Leonard Hofstadter and Penny . Leonard reluctantly agrees to let Penny...
Actor Johnny Galecki, Actress Matlida Lutz, Director Javier Gutierrez, Actress Bonnie Morgan, Actor Alex Rose and Actress Aimee Teegarden attend the...
The Geology Elevation" -- Pictured: Amy Farrah Fowler , Penny and Leonard Hofstadter . When Bert , a Caltech geologist, wins the MacArthur Genius...
Actors Kaley Cuoco and Johnny Galecki attend The Paley Center For Media's 33rd Annual PALEYFEST Los Angeles ÔThe Big Bang Theory' at Dolby Theatre on...
Actors Jim Parsons, Melissa Rauch, Kunal Nayyar, Kaley Cuoco, Simon Helberg, Mayim Bialik and Johnny Galecki perform onstage during the 24th and...
Johnny Galecki and Kaley Cuoco at the PEOPLE'S CHOICE AWARDS 2016, from the Microsoft Theater on Wednesday, Jan. 6, 2016 on the CBS Television...
Actors Jim Parsons and Kunal Nayyar, Mayim Bialik, Melissa Rauch, Simon Helberg, Johnny Galecki and Kaley Cuoco-Sweeting attend a ceremony honoring...
Actors Kaley Cuoco and Johnny Galecki attend The 41st Annual People's Choice Awards at Nokia Theatre LA Live on January 7, 2015 in Los Angeles,...
Actors Johnny Galecki; Kelli Garner arrive at the 65th Annual Primetime Emmy Awards at Nokia Theatre L.A. Live on September 22, 2013 in Los Angeles,...
Actor Johnny Galecki arrives to the 63rd Primetime Emmy Awards at the Nokia Theatre L.A. Live on September 18, 2011 in Los Angeles, United States.
Johnny Galecki and Alaina Meyer attend the 26th annual Race to Erase MS on May 10, 2019 in Beverly Hills, California.
Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik and Melissa Rauch from the cast of "The Big Bang Theory" attend...
Actor Jim Parsons, Actress Kaley Cuoco and Actor Johnny Galecki pose in the press room at the 61st Primetime Emmy Awards held at the Nokia Theatre on...
Alaina Meyer and Johnny Galecki attend the 24th annual Critics' Choice Awards at Barker Hangar on January 13, 2019 in Santa Monica, California.
Johnny Galecki and Alaina Meyer attend the InStyle And Warner Bros. Golden Globes After Party 2019 at The Beverly Hilton Hotel on January 6, 2019 in...
In this handout photo provided by NBCUniversal, Presenters Johnny Galecki, Kelly Cuoco and Jim Parsons speak onstage during the 76th Annual Golden...
The cast of The Big Bang Theory Johnny Galecki and Kaley Cuoco pose at a portrait session for TV Guide, in Los Angeles, CA on September 20, 2010....