In 2017, Macaulay filmed the movie "Changeland" and began dating his costar, Disney Channel star Brenda Song. Entertainment Tonight reported that the new couple were spotted on a double date with "Changeland" director Seth Green and his wife, Clare Grant.
They've stayed pretty private about their relationship for the most part, although they did both speak to Esquire about their bond in 2020. "People don't realize how incredibly kind and loyal and sweet and smart he is," Song said, as reported by People. "Truly what makes Mack so special is that he is so unapologetically Mack . . . He knows who he is, and he's 100 percent okay with that. And that to me is an incredibly sexy quality."
In April 2021, they announced the birth of their son, Dakota, and in 2022 it was reported that they had gotten engaged. News broke in March 2023 that they had also welcomed a second child, Carson, sometime in 2022.
