“We connected immediately and my career and my life were changed that day,” Bakula wrote.

I loved him dearly and was honored to know him.

He made me a better human being."

QUANTUM LEAP, Dean Stockwell, Scott Bakula, 1989-93. © Universal Television / Courtesy: Everett Col

Dean Stockwell, left, and ‘Quantum Leap’ costar Scott Bakula in the early-1990s.Everett Collection

Stockwell’s longtime friend and fellow child actorRuss Tamblynhonored him as well, sharing an emotional tribute on Twitter.

A godfather-figure to my daughter, Amber.

Loving dad," Tamblyn wrote.

Rest easy now, brother.

Give Dennis [Hopper] a hug from me when you see him on the other side."

Stockwell died Sunday of natural causes at his home, the actor’s representative confirmed to EW.

See more tributes to Stockwell below.