On Monday, Macaulay's sister-in-law, Jazz Charton, took to Instagram to announce that she and her husband, Kieran Culkin, are expecting their first child. The pair tied the knot back in 2013.
"My favourite surprise so far," Jazz, who did not reveal the baby's sex, captioned a photo of her sonogram. "We had no idea how much we wanted this until it happened."
Jazz continued her sweet caption, revealing that her pregnancy was a surprise and hinting that it happened after the 2019 Golden Globes back in January, when Kieran, 36, was nominated for his role on Succession.
"We’re excited/terrified/ecstatic/unprepared but we cannot wait to meet our little unexpected creation in September #theglobeswerefun #koalatummy," she wrote.