The Pretty Little Liars stars, who play lovebirds Hanna Marin and Caleb Rivers on the ABC Family show, are reportedly dating, according to Us Weekly.
Rumors started to fly that the costars were an item after they were spotted kissing at the Coachella Music and Arts Festival in Indio, Calif. in April, the mag reported.
And they've been snapped out and about since then, canoodling at the Nylon Magazine Young Hollywood Party May 14 and leaving the Chateau Marmont together May 24.
After seeing the mag's story, though, Ashley insisted she and Tyler are just friends, tweeting Friday, "Haha @usweekly what are you gonna come up with next??? Hilarious. Although I do love you @tylerjblackburn."
The 23-year-old actress, who parted ways with Justin Bieber's "swagger coach" Ryan Good earlier this year, said she's currently focusing on her career rather than relationships, telling Seventeen, "Ryan and I are still close, but I'm too young to be in a serious relationship. Work is my boyfriend!"