Jennifer Garner celebrated Alias co-star Victor Garber's 75th birthday with heartfelt tribute.

Taking to Instagram on Sunday, the actress posted series of throwback photos with Garber, showcasing their close bond.

Garner penned a touching tribute, affectionately calling him 'spy daddy' referencing his role as her onscreen father in the drama.

She wrote in the caption, "Everything’s better when I’m next to you, Spy Daddy," adding, "Happy Birthday, @therealvictorgarber!"

In one image, the pair were captured sharing a laugh together, with Garner resting her head on Garber's shoulder.

Another photo depicted them posing together, highlighting their enduring friendship beyond the show.

Read Also: Jennifer Garner calls 'Alias' co-stars Victor Garber, Ron Rifkin her 'best guys'

Fans and followers flooded the comments section, expressing their admiration for the duo's friendship.

One wrote, “Alias is one of my favs!”

“I haven't missed a single episode of the series. Y’all was perfection,” another commented,

The third comment read, “Happy birthday Best wishes it's been a long time but to today I still see Alias again I can't help it @jennifer.garner”

This comes after their reunion in January, where Garner, Garber, and fellow Alias co-star Ron Rifkin met up in New York City

On Instagram, Garner shared a photo alongside the caption expressing her affection, she wrote, “NYC doesn’t happen if I don’t get a moment with my best guys, Ron and Victor.”