The Liv and Maddie costars and real-life couple, who make up the musical duo The Girl and the Dreamcatcher, debuted their latest lyric video on Thursday.
"Someone You Like" is their first original song together and was actually first released on YouTube a year ago.
McCartan also announced on Thursday that he and Cameron are engaged. "Dedicating my 1,000th post to my fiancée. I can't believe I get to call you that. Thanks for saying yes," he wrote on Instagram.
Recently, McCartan answered a couple of fan questions on Twitter, and couldn't help but gush about his 3-year romance with Cameron.
Write about someone you love https://t.co/cvXiaiBHtJ— Ryan McCartan (@ryanmccartan) April 11, 2016
"What's your secret on epic song making?" one follower asked regarding "Someone You Like." The actor adorably responded, "Write about someone you love," along with a heart faced smile emoji.
And if you can't get enough of McCartan's melodious voice, tune in this fall when he is set to take over the role of Brad in Fox's remake of The Rocky Horror Picture Show.