Kaley Cuoco's Dating History, From Johnny Galecki to Tom Pelphrey

Luckinbill, who is best known for his longtime role on “The Young and the Restless,” dated Cuoco in 2002.

Cuoco and Zegers struck up a romance in 2003 while costarring in “The Hollow.” They dated for a year, and Zegers went on to star on “Gossip Girl.” In 2015, he welcomed twin girls with his wife, Jaime Feld.

Cuoco dated Lowenstein, a singer who performs with his twin brother as part of the musical duo Evan and Jaron, between 2005 and 2006, per Us Weekly.

Beginning in 2008, Cuoco and Galecki dated secretly for over a year while filming “The Big Bang Theory.” They didn’t reveal their romance until calling it quits in 2009. Afterward, they continued to star opposite each other (as husband and wife!) on the CBS show.

Cuoco married tennis player Ryan Sweeting in January 2014; at the time of her engagement, Galecki told reporters that he was “very, very happy for her,” adding, “She’s very happy, which makes me terribly happy.” She and Galecki are still close IRL, and they revisited their romance in an excerpt from the book “The Big Bang Theory: The Definitive, Inside Story of the Epic Hit Series” shared by Vanity Fair on Oct. 3. “It was obvious there was always something there,” Cuoco said. “There was chemistry and we were crushing on each other. That was the whole first season until we actually got together for real.”

After splitting from Galecki, Cuoco began seeing French, a musician. The couple dated from 2011 to 2012 and even recorded a duet of “Somewhere Over the Rainbow” to benefit the Human Society. French is now married to Ashley Tisdale, whom he began dating in December 2012.

In October 2011, Cuoco got engaged to addiction-specialist Resnik, but the couple called it quits just five months later.

After her split from Resnik in 2012, Cuoco began dating Bollinger. They ended their romance in January 2013.

Cuoco grabbed headlines in summer 2013 when it was revealed that she was dating the British actor. Per Entertainment Weekly, the couple was spotted on just one outing – a pre-Fourth of July shopping trip – before it was announced that they had split after just twelve days together.

After Cuoco’s short-lived romance with the Man of Steel, she began dating the tennis player. They got engaged in September 2013 after three months together and tied the knot in a lavish ceremony three months after that, on New Year’s Eve. In September 2015, nearly two years after getting married, the couple called it quits.

Cuoco was reported to be “quietly dating” “Arrow” actor Blackthorne in December 2015, though the two were never spotted out together. At the time, a source told Us Weekly that it was “new, but she’s really excited about it.”

Cuoco was first linked to equestrian Cook in March 2016 after she posted a snap of the two on Instagram. The pair tied the knot in 2018 but announced their split in 2021, sharing a joint statement with People. “Despite a deep love and respect for one another, we have realized that our current paths have taken us in opposite directions,” it read.

Cuoco confirmed her relationship with the “Ozark” star in May, and they attended the Emmy Awards together in September. The pair’s relationship reached a new milestone when, on Oct. 11, they announced that they are expecting a baby girl together.