Danneel Harris | Entertainment News, Photos, and Videos

Jensen Ackles and his longtime girlfriend Danneel Harris are engaged, her rep confirms exclusively to JustJared.com.

The 31-year-old Supernatural actor and 30-year-old One Tree Hill actress have been dating for about three years but have been friends for nearly a decade. The couple, who are longtime members of the WB/CW family, co-starred in the 2007 romantic comedy Ten Inch Hero.

Danneel showed off her beautiful engagement ring on Saturday at the Breeders’ Cup in Los Angeles.

Congrats to the happy couple!

UPDATE: Danneel confirmed the good news herself on her Twitter account. Simply put, she wrote, “Yes… !”

Supernatural stud Jensen Ackles and his girlfriend, One Tree Hill actress Danneel Harris, come out to watch the horses race at the Breeders’ Cup World Thoroughbred Championships at Santa Anita Park on Saturday (November 7) in Los Angeles.

Jensen, 31, and Dannell, 30, were accompanied by Star Trek star John Cho and his Harold & Kumar Escape from Guantanamo Bay co-star Rachael Harris. Also in attendance: Grey’s Anatomy actor Justin Chambers and Nip/Tuck‘s Julian McMahon (not pictured).