Demi Lovato has reportedly been dating Ryan Phillippe. The 18-year-old singer and actress is said to have been seeing 'The Lincoln Lawyer' actor in the last few months, but things cooled since he became a father with his ex-girlfriend, Alexis Knapp, two weeks ago. A source told the E! news service: "It was really hot and heavy for a while," but added Demi wasn't aware Ryan, 36, was to become a father for the third time "until it basically happened. It kind of threw her for a loop."Ryan - who also has two children, Ava Elizabeth, 11, and Deacon Reese, seven, with ex-wife Reece Witherspoon - was with Alexis when she gave birth to a daughter, who she has named Kai.
A spokesperson for the 21-year-old actress said, however: "She has never asked Ryan for any help, nor does she expect it."Ryan, who dated Alexis in 2010, has been supporting her in the later stages of her pregnancy, although he is said to be waiting for the results of a paternity test to prove if he is the father.A source said: "He is a good father, and whether this is his baby or not, he wants to do the right thing and be supportive." Ryan also had an on/off relationship with actress Amanda Seyfried earlier this year.