George Clooney
Actor George Clooney at the 70th Venice Film Festival in Venice. REUTERS

Mere weeks after George Clooney proposed to Amal Alamuddin, he is already being hit with cheating rumors. Tabloids are claiming the actor cheated on ex-girlfriend Stacy Keibler with the British attorney.

The National Enquirer claims Clooney introduced Alamuddin to his mother last spring, while he was still dating the leggy former WWE diva. The Enquirer calls it a “twisted love triangle.” However, Clooney’s rep has already shot down the accusation. “He didn’t meet Amal for months after Stacey … and didn’t start dating her until late October,” his rep tells RumorFix.

Clooney dated Keibler for two years before splitting last year. She went on to marry entrepreneur Jared Pobre and is now pregnant with their first child. The 53-year-old actor, who was one of Hollywood’s top bachelors, was first romantically linked to Alamuddin in October 2013 after they were spotted out together in London. In March, People reports Clooney went to Dubai to visit Alamuddin’s family, and “they felt at ease with him immediately.”

He proposed to Alamuddin on April 22, though it was not confirmed until six days later." George and Amal are trying to keep things very low-key but they also aren't really trying to hide this, it doesn't seem," People magazine reported, citing an unnamed source.

The couple recently celebrated their upcoming nuptials with friends in Malibu, California, by singing karaoke and enjoying wine. Guests in attendance included Cindy Crawford and U2 frontman, who was also celebrating his birthday. After toasting with tequila, Clooney and Alamuddin could not keep their hands off one another. "After the toast, George and his fiancée were all over each other," a source told People magazine. "Lots of hugging."