Alex Pettyfer, star of the upcoming film Magic Mike, is reportedly engaged to fellow costar Riley Keough, who is actually the granddaughter of Elvis Presley and daughter of Lisa Marie Presley.

US Weekly reported on Tuesday that Pettyfer and Keough were engaged after the pair was seen in Los Angeles having lunch at Le Petit Four with an engagement ring of Keough's finger. The couple have been dating for about six months while filming Magic Mike who are also involved as lovers in the film.

While reps for neither Pettyfer, 21, nor Keough, 22, addressed the claims, Pettyfer gave a glimpse into his life and hinted at the engagement via Twitter.

I'm very happy in my personal life. Let's leave it at that, he tweeted in response to the US Weekly report.

In October, Pettyfer and Keough were seen kissing at Los Angeles International Airport (LAX) while waiting for a flight together, according to E! News.

This is not the first time Pettyfer fell for a costar opposite him in a film. He has previously dated costars Diana Agron and Emma Roberts while Riley Keough dated others in the limelight like Ryan Cabrera and Jonah Hill, according to US Weekly.