John Stamos cradles his ‘cutest’ son to Jimmy Kimmel on Halloween, and he reacts with the joy

The 55-year-old John Stamos introduced his son Billy to the world, on an episode of Jimmy Kimmel Live, and it was adorable.

The little tot was dressed as Mork from "Mork & Mindy" for his big evening out, and it was clear that Stamos loves every second of being a dad.

Stamos asked: "Isn't he just the most beautiful baby? I'm so in love."

Read more on our Twitter account, @amomama_usa. The video clip of his first television appearance can be seen below.

Kimmel agreed with Stamas and said that it was the cutest baby he had ever seen. He added that Stamos has to "make more of these."

Billy was born back in April and was named after Stamos' later father, William John Stamos. In an interview, soon after his birth, Stamos said he hopes he makes his father proud in raising his son.

Stamos feels that his newborn son has given him a new lease on life, and he's isn't even concerned about spending late nights on baby duty.

The "Fuller House" actor is married to "I Am Legend" star Caitlin McHugh. The duo began dating two years ago and announced their engagement in October 2017.

They tied the knot in February 2018. Billy is their first child, and Stamos was in the delivery room with the 31-year-old McHugh.

He said that Billy's delivery happened so fast, but added that he was eternally grateful to get to spend such a wondrous moment with his wife.

Stamos is most famously known for his role of Jesse Katsopolis on the 1990's sitcom, "Full House," and reprised the part for the series reboot, "Fuller House," in 2016.

He is currently filming the series You and was cast in the role of Dr. Nicky. The TV show is based on a novel by Caroline Kepnes and follows the life of a bookstore employee.