‘Blue Bloods’ Star Donnie Wahlberg Honored Tom Selleck in the Sweetest Way on Instagram

A happy belated birthday is in order for Tom Selleck!

The Magnum, P.I. actor celebrated his 77th birthday on Saturday, January 29, and along with many fans, Donnie Wahlberg was quick to wish him a happy day.

“Happy Birthday to my TV dad, and real life friend & father figure, Tom Selleck,” he captioned a carousel of photos on Instagram. “Thankful to have you in my life ‘dad’, and blessed to have a small supporting role in the amazing legacy that is your life! Love you, Dad! Always, Son”

This content is imported from Instagram. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

And, just like on the show, Donnie was quick to add in a little sass while paying tribute to his dad.

“PS, I know you won’t see this because you probably have no idea what @instagram is, but it’s ok because I don’t mind sharing with the world that you mean a lot to me,” he wrote in parentheses to conclude his post.

As a refresher, Donnie (Danny Reagan) and Tom (Frank Reagan) have been working together on the set of Blue Bloods for over 10 years. In fact, they, along with the rest of the Blue Bloods cast, just celebrated their 250th episode, a milestone that many shows only hope to reach, and one that fans are whole-heartedly grateful for.

“Two of my favorites from the [80s] brought together later in life & still going strong, better than ever! Happy Birthday, Tom,” one fan commented on Donnie’s post.

“This cast is perfect for each other. You all are the best ensemble on tv,” another fan exclaimed.

“Happy Birthday Tom. Love watching the [two] of you play father and son,” someone else wrote.

Here’s to many, many more birthdays — and on-screen moments between the two!