The 22-year-old singer and Ronson, 43, released a video Tuesday for Ronson's single "Find U Again."
Cabello plays a lounge singer being tracked down by several bounty hunters. Ronson portrays one of Cabello's pursuers, who ends up falling in love with Cabello's character and helping her escape.
"baby, i know I'll never find you again," Cabello tweeted Tuesday. "video with @MarkRonson is out now."
"Find U Again" appears on Ronson's new album, Late Night Feelings, which debuted in June. The album also includes the singles "Nothing Breaks Like a Heart" featuring Miley Cyrus and "Late Night Feelings" featuring Lykke Li.
Cabello voiced her enthusiasm for Ronson in an Instagram post in April.
"when mark told me he was making a project called 'late night feelings' full of emo bops sung by girls about love and heartbreak, I said......... I'll be there in 5 minutes. I needed to be a part of it!!! I'd wanted to work with him for such a long time and have always been a huge fan," she wrote.