30-year-old Bloom competed for the US ski team in the 2002 and 2006 Winter Olympics.
He has also played as a professional American football player with the Pittsburgh Steelers and Philadelphia Eagles.
Life & Style reports that Lowndes and Bloom were recently spotted cuddling in public in LA.
Reps for neither Lowndes nor Bloom have confirmed the reports of a romance.
Lowndes plays Adrianna on 90210, where she has acted as a love interest for Rumer Willis's character .
She has dated her TV co-star Adam Gregory, as well as Breaking Bad actor Aaron Paul.