Buckley, 35, is best known for his roles on One Tree Hill, Lipstick Jungle and most recently, iZombie.
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Prior to her current romance with Buckley, Michele, 29, was in a relationship with Matthew Paetz, who she split with in late February. The relationship, which lasted nearly two years, was her first following the death of her former Glee co-star and boyfriend Cory Monteith in 2013.
Despite the tragedy, Michele has always stayed positive about her dating life, telling FLARE magazine in a 2015 interview that she wanted to take her time getting back on the dating scene after Monteith died.
"I wanted to make sure that I was okay with me, feeling strong and feeling happy on my own," she told the glossy. "I wanted to make sure that I was a whole person again and that no one was coming into my life to put me back together. I needed to do that on my own."