Kourtney Kardashian may ringing in her 37th birthday in chilly Iceland, but her ex, Scott Disick, is keeping things hot on Instagram.
Disick celebrated the mother of his three children with a throwback photo of the two kissing in the ocean. "Happy birthday @kourtneykardash everyone who knows you loves you so much!" he wrote alongside the sexy throwback snap.
WATCH: Kourtney Kardashian's Throwback Photo From Her 20th Birthday Proves She Doesn’t Age
Kardashian and Disick split last summer after nearly a decade of dating -- and after he was spotted out with another woman -- but have been sparking rumors of a reconciliation lately.
"We're not getting back together right now, but I don't know like, what the future holds in life," Kardashian played coy during a recent episode of the Today show. "We're just doing our best to be the best parents...We're friends at this point."
While Disick doesn't appear to be in Iceland for the b-day festivities -- he was partying with Kylie and Kendall Jenner over the weekend at Coachella -- he did join the family on a recent trip to Vail, Colorado.
Find out more about Disick's Coachella weekend getaway with the Jenners in the video below.