On Monday October 8, the former Jon & Kate Plus 8 star took to Instagram to send his daughters Mady and Cara, who he shares with with ex-wife Kate Gosselin, birthday wishes.
"Happy 18th Birthday!!! To my twin girls, Mady & Cara!!! Love, Dad," Jon wrote.
As Radar readers know, Jon has been estranged from his daughters since 2013 following a contentious divorce from Kate.
According to an insider, the girls are "completely aligned with the mother."
It seems for the time being, Jon has only been able to see his 14-year-old daughter Hannah.
In August, Jon, 41, revealed that she was "permanently" living with him.
Despite his strained relationship with his kids, he continues to make an effort to be a doting a dad.
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