Washington: Justin Timberlake has not been cheating on longtime girlfriend, Jessica Biel, with TV personality Olivia Munn, according to sources.
"There is no truth to the reports. Olivia Munn is not that type of girl," People Magazine quoted the source as saying.
Meanwhile, Timberlake has been spending a lot of time with Biel.
Last weekend, he was hanging out with Biel in a skybox on Sunday during the dramatic ending of the Justin Timberlake Shriners Hosptials for Children Open golf tournament at TPC Summerlin in Las Vegas.
The actress also spent time with Timberlake``s family, and was spotted backstage at his Saturday night benefit concert at the Planet Hollywood Resort and Casino, which featured a performance by Christina Aguilera.
After the show, the couple continued their night at Haze Nightclub, arriving hand-in-hand around 2 a.m.
On Tuesday night, the pair stepped out for dinner at Fraiche in Culver City, Calif.
Timberlake was also by his girlfriend``s side on Monday night, supporting her at a screening of a short film she directed, which debuted at the Chateau Marmont.
Another source added, "Justin and Jessica are doing fine."
Reps for Munn and Timberlake had no comment about their clients`` personal lives.