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OTRC: Demi Lovato dating Ryan Phillippe, report says

Demi Lovato appears in a promotional still for her '20/20' interview with Robin Roberts in April 2011. / Ryan Phillippe appears on ABC talk show 'Jimmy Kimmel Live!' on Monday, March 14, 2011.

Demi Lovato has been "quietly dating" 36-year-old actor Ryan Phillippe for a few months, according to E! News.

The two have not commented on the report.

A source told the entertainment news site that it was "hot and heavy" for a while, but things cooled down a bit when Phillippe's ex-girlfriend Alexis Knapp gave birth to a 2-week-old daughter Kai, who may be his baby and which reportedly threw the 18-year-old "Sonny With a Chance" actress "for a loop."

Phillippe was reportedly in the delivery room when Knapp gave birth on July 7. Phillippe, known for movies such as "Cruel Intentions" and recently, "The Lincoln Lawyer," has two children with ex-wife Reese Witherspoon - daughter Ava, 11, and son Deacon, 7. It has not been confirmed if he is the father of Knapp's child.

The "Lincoln Lawyer" actor was romantically linked to Amanda Seyfried before reportedly breaking up earlier this year. Meanwhile, Lovato was recently linked to "That 70s Show" actor Wilmer Valderrama and dated Joe Jonas in 2010.

Lovato has been busy promoting her new single, "Skyscraper," which premiered last week. In May, Lovato posted a photo of herself in a bikini, just weeks after she underwent treatment in a clinic and revealed she had battled anorexia and bulimia.

On April 19, a Disney Channel spokesperson confirmed Lovato would not return to her show "Sonny With a Chance." The actress, who had played main character Sonny Munroe since the show began in 2009, had said she wanted to focus on her music and that she didn't think shooting the series would be "healthy" for her recovery.

Reps for the stars had no immediate comment on the report.

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