Simon Cowell's son, Eric, and Terri Seymour's daughter, Coco, are the cutest little BFFs!

Terri, 41, took to Twitter on Monday, March 14 to share a sweet snapshot of her one-year-old daughter receiving a birthday kiss from Simon's son, 2.

"A little kiss for the #birthday girl! #Eric and #Coco, #BirthdayKisses #FirstBirthdayParty," Terri captioned the photo of the two pals.

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Simon, 56, and Terri — who works as an Extra correspondent — previously dated for six years from 2002 until 2008. Following their breakup, the former American Idol judge welcomed Eric with girlfriend Lauren Silverman in February 2014. Terri welcomed Coco with boyfriend Clark Mallon in March 2015.