The couple announced the birth of their son on Saturday morning on Instagram, naming him Jack Blues Bieber.
Singer Justin, 30, is well-known for singles including “Baby,” “Love Me,” and “Yummy.” He was first found online at the age of 13.
The Canadian superstar’s continuous treatment from Ramsay Hunt syndrome, a condition that can cause facial paralysis, prompted him to postpone the remaining dates of his Justice world tour last year.
Hailey, 27, is an actress’s niece, Alec, William, and Daniel Baldwin’s niece, and the daughter of actor Stephen Baldwin.
In 2018, the pair tied the knot in a covert ceremony in New York, and the following year, they had a grander wedding.
Video and pictures from a photo shoot where Hailey showed off her growing baby bulge in a white lace dress earlier this year—during what appeared to be a vow renewal in a field—were used to reveal the pregnancy.