Join or Sign In
Sign in to customize your TV listings
By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.
Birth Name:John Mark Galecki
Birth Place:Bree, Belguim
Profession Actor
The Big Bang Theory - Season 7 - "The Itchy Brain Simulation" - Simon Helberg, Jim Parsons, Kunal Nayyar and Johnny Galecki
The Big Bang Theory - Season 7 - "The Raiders Minimization" - Jim Parsons, Kunal Nayyar, Johnny Galecki, Simon Helberg
The Big Bang Theory - Season 3 - "The Creepy Candy Coating Corollary" - Johnny Galecki and Kaley Cuoco
The Big Bang Theory - Season 7 - "The Indecision Amalgamation" - Kunal Nayyar, Kaley Cuoco-Sweeting and Johnny Galecki
The Big Bang Theory - Season 5 - "The Friendship Contraction" - Jim Parsons, Johnny Galecki
The Big Bang Theory - Season 3 - "The Bozeman Reaction" - Johnny Galecki, Kaley Cuoco and Jim Parsons
Johnny Galecki - "Bookies" portraits, Jan. 2003
The Big Bang Theory - Season 8 - "The Anxiety Optimization" - Kunal Nayyar, Simon Helberg and Johnny Galecki
The Big Bang Theory - Season 7 - "The Scavenger Vortex" - Johnny Galecki, Melissa Rauch, Simon Helberg and Mayim Bialik
The Big Bang Theory - Season 1 - "The Big Bran Hypothesis" - Johnny Galecki as Leonard
The Big Bang Theory - Season 1 - "The Bat Jar Conjecture" - Simon Helberg as Howard, Kunal Nayyar as Rajesh, Sara Gilbert as Leslie Winkle and Johnny Galecki as Leonard
The Big Bang Theory - Season 3 - "The Plimpton Stimulation" - Judy Greer, Johnny Galecki
The Big Bang Theory - Season 6 - "The Closet Reconfiguration" - Johnny Galecki, Kaley Cuoco, Mayim Bialik, Jim Parsons and Kunal Nayyar
The Big Bang Theory - Season 5 - "The Recombination Hypothesis" - Jim Parsons, Kunal Nayyar, Simon Helberg, Johnny Galecki
The Big Bang Theory - Season 3 - "The Electric Can Opener Fluctuation" - Simon Helberg, Johnny Galecki, and Kunal Nayyar
The Big Bang Theory - Season 2, "The Killer Robot Instability" - Kunal Nayyar as Rajesh Koothrappali, Simon Helberg as Howard Wolowitz, Jim Parsons as Sheldon, Johnny Galecki as Leonard
The Big Bang Theory - Season 6 - "The Tenure Turbulence" - Johnny Galecki, Regina King and John Ross Bowie
The Big Bang Theory - Season 5 - "The Speckerman Recurrence" - Kaley Cuoco, Johnny Galecki, Jim Parsons
The Big Bang Theory - Season 2 - "The Hofstadter Isotope" - Johnny Galecki as Leonard, Kaley Cuoco as Penny and Kevin Sussman as Stuart
The Big Bang Theory - Season 3 - "The Einstein Approximation" - Johnny Galecki and Kely Cuoco
The Big Bang Theory - Season 5 - "The Beta Test Initiation" - Johnny Galecki, Kaley Cuoco
The Big Bang Theory - Season 2 - "The Classified Materials Turbulance" - Johnny Galecki, Simon Helberg, Kunal Nayyar and Jim Parsons
The Big Bang Theory - Season 5 - "The Pulled Groin Extrapolation" - Kaley Cuoco as Penny, Mayim Bialik as Amy, Johnny Galecki as Leonard