'Boo'd Up' singer Ella Mai debuts baby bump after boyfriend Jayson ...

Ella Mai is going to be a mom!

The “Boo’d Up” singer debuted her growing baby bump while out celebrating her boyfriend Jayson Tatum’s first NBA championship win.

According to a video posted online, the British musician was seen wearing her beau’s Boston Celtics jersey while out with a few friends after the team defeated the Dallas Mavericks.

In a second clip, Mai was spotted in TD Garden after the Celtics won their 18th NBA championship Monday night.

She fanned herself with a piece of paper before giving a hug to one of the players as they walked down the hallway.

Page Six has reached out to Mai’s reps for comment but did not immediately hear back.

Tatum, 26, and Mai, 29, have been romantically linked since 2019 when she was seen sitting courtside as the Celtics took on the New York Knicks at Madison Square Garden.

The following year, eagle-eyed fans spotted that the “Shot Clock” singer was in the athlete’s home during her Instagram Live session.

Throughout the years, the couple has continued to keep their romance low-key.

During a 2022 appearance on “The Breakfast Club,” Mai dodged questions about her relationship status.

“There’s rumors that you’re a Boston Celtics fan,” asked co-host DJ Envy.

“Oh really?” she replied.

“They say you’re a Boston Celtics fan and possibly dating a Boston Celtic. Is there any truth to that?” he teased.

Mai replied, “I’m a basketball fan definitely, but you know I’m not one to talk about my dating life.”

That July, Tatum and the Grammy winner made their first public appearance together at Michael Rubin’s annual Fourth of July White Party in the Hamptons.

The former Duke player is already dad to son Jayson “Deuce” Tatum Jr., whom he shares with his high school girlfriend, Toriah Lachell.