George Marshall "Georgie" Cooper Jr. (portrayed by Jerry O'Connell as an adult; recurring: The Big Bang Theory seasons 11–12 and Montana Jordan as a youth; Young Sheldon and Georgie & Mandy's First Marriage) is Sheldon and Missy's older brother who resides in Texas and runs a car tire business. Often at odds while growing up, the Cooper brothers later reconcile their differences. George Jr. is a laid-back character who likes to make money and is a known womanizer. By season 12 of The Big Bang Theory, it is revealed that he has been twice married and divorced.