The former MLB player, 43, took to Instagram and shared a photo with the singer, 49, and their kids; his two daughters, Natasha Alexander, 14, and Ella Alexander, 10; and her twins Maximilian David Muñiz and Emme Maribel Muñiz.
He captioned the post, "A perfect Saturday afternoon. Family. Friends. And a game at @yankees Stadium!"
Here's the family picture from the Yankees game, check it out.
Alex's two kids are from his ex-wife Cynthia Scurtis, who he married in 2002 and got a divorce in 2008. On the other hand, Jennifer's two kids are from her ex-husband Marc Anthony, who she married in 2014 and divorced in 2017.
He also posted a video on Instagram Stories in which showed Jennifer and his daughter sings along to Take Me Out to the Ball Game.
Another photo shared on his Instagram Story showed son Max mooning the camera, which Alex pointed out with a big black arrow.
The couple, who began dating Jennifer in February 2017, announced their engagement on March 9. The sportsman proposed the songstress with a $1.4 million worth emerald-cut diamond ring in the Bahamas
For more updates, stay tuned to Frostsnow.