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“Fuller House” co-stars Lori Loughlin and John Stamos have been an iconic on-screen couple for years, but off screen, they’re the best of friends.

That’s why it comes as no surprise that they finish each other’s … sandwiches?!

In honor of Stamos’s 55th birthday on Sunday, Loughlin shared a cute video of the two of them on Instagram lip-syncing the song “Love Is An Open Door” from the hit movie “Frozen.”

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“Happy Birthday @johnstamos It’s been 30 years of laughter, fun and finishing each other’s .... sandwiches,” Loughlin captioned the picture. “Here’s to 30 more. Have a beautiful day with @caitlinskybound & your pride and joy, Billy!! Love you buddy.”

Her message is enough to melt any fan's heart.

It's not the first time these two have offered up such an sweet and well-synced treat. In honor of Stamos' 54th birthday, Loughlin shared another video they filmed in front of that same door three years ago.

In that throwback clip, they celebrated the 2008 movie "Step Brothers," and focused one Stamos-centric line in particular.

The friends have been there for each other for many other milestones. Loughlin recently sent her on-screen hubby a video message for the birth of his son in April.

If you ask us, these Uncle Jesse and Aunt Becky videos are instant classics.

This story is an updated version of a previously published article.