Ariana Grande is dating 'SNL' star Pete Davidson, weeks after dumping Mac Miller

Ariana Grande and SNL star Pete Davidson are dating.

"It just started and it's casual," a source told People magazine on Monday, adding that "Ariana and [her former boyfriend] Mac [Miller] officially broke up right after Coachella weekend [in late April], but they ultimately struggled for a long time with their relationship, and it was basically over last year."

"Ariana was holding Mac together for a long time and it wasn't a good relationship for her," the source added. "She is in a very good place and very happy now."

People report that Davidson was there to support Grande at the Billboard Music Awards on Sunday.

"After Ariana's performance, they were backstage and he had his arm around her," a second source told the publication. "They seemed very lovey-dovey. He was hanging out with her and her friends with his arm around her. She seemed quite smitten."

Davidson announced his split from his girlfriend of two years -- and the daughter of Larry David -- Cazzie David, last week.

Davidson told People, "We're not together anymore. [She's a] very talented girl. She'll be great and she'll be fine."

Grande opened up about her split from Miller earlier this month, calling the rapper "one of my best friends and favorite people on the planet."

"I respect and adore him endlessly and am grateful to have him in my life in any form, at all times regardless of how our relationship changes or what the universe holds for each of us," she captioned a photo of them cuddling.