Watch: '13 Going On 30' stars Mark Ruffalo and Jennifer Garner recreate Michael Jackson 'Thriller' scene at Hollywood Boulevard

Mark Ruffalo and Jennifer Garner (All Pics/Instagram)

Fans of the film '13 Going On 30' were in for a sweet surprise as actor Mark Ruffalo and Jennifer Garner reunited. The occasion was to celebrate Mark receiving his star on the Hollywood Walk of Fame in a ceremony on Thursday. Mark's close friend and actor Jennifer Garner was also present at the ceremony. She gave a huge shout out to Mark.

"How lucky are we to have been in a movie that kids are still dressing up as for Halloween?" said Garner in her speech, before listing some of Ruffalo's other leading ladies.

"I wonder if my colleagues Reese Witherspoon, Jennifer Aniston, Gwyneth [Paltrow], Keira Knightley -- I wonder if they would agree that Mark owes this rom-com success to the scruffy hair, the untucked, cute button down, both of which became the norm for cute guys everywhere for the next 20 years," she added.

"I wonder if these esteemed ladies enjoyed Mark's anxiety as much as I did?" she continued.

"I wonder if he tried to drop out of their films like he did out of ours after the first rehearsal of the 'Thriller' dance, where Mark went from kind of shocked that we actually had to do this to antsy to deathly quiet to 'Bro, this is not for me'. "To work with you, Mark, is to love you, I don't care what anyone says," Garner said.

The '13 Going On 30' stars Mark Ruffalo and Jennifer Garner then posed for pictures together and suddenly broke into a dance recreating a popular scene from their film. In the film, the duo who are childhood friends do the Michael Jackson 'Thriller' step together. The audience cheered loudly as the two actors recreated the moment after all these years. The film was released in April 2004 and became an instant classic, boosting Ruffalo and Garner's careers astronomically.

The 'Poor Things' actor appeared at the special occasion with his wife Sunrise Coigney and two of their three kids -- Bella, 18, and Keen, 22. Odette, 16, People reported. In his acceptance speech, Mark expressed his gratitude to his family.

"My kids, Bella and Keen and Odette, you taught me so much about being a parent, being a man, being an actor, and this is your star, my whole family, in ways that you won't understand for some time," he said.

Mark is the 2,772nd person to receive a star on the famed street. He also received a tribute from director David Fincher, who he worked with in the 2007 crime drama Zodiac.

(with inputs from ANI)