Dwayne Johnson had the best surprise for a longtime fan.

After learning about “Grandmom Grover”, a.k.a. Marie Grover, through her granddaughter’s best friend, Jamie Klingler, a megafan who turned 100-years-old on Tuesday.

According to Klingler, Grandmom Grover has been a Johnson fan for over 30 years.

RELATED: Dwayne Johnson Confirms WWE Return For Smackdown Premiere On Fox: ‘There’s No Place Like Home’

Klingler tried everything to get in touch with the “Jumanji” actor and finally, after reaching out on Twitter, Johnson finally responded.

“Oh my God – my punt to get The Rock to wish my best friend’s gram a happy 100th birthday as she adores him might work,” Klingler wrote. “A friend of a friend is in touch. She will lose her mind. When we were in high school – 25-years-ago – she would wear a Rock sweatshirt and tell us how handsome he is.”

And Johnson responded, “What?? First I’m hearing of this! Who’s turning 100? Beautiful age! What do you need, Jamie?”

Johnson followed through and Grandmom Grover was thrilled:

RELATED: Dwayne Johnson Thanks Vin Diesel For Supporting ‘Hobbs & Shaw’, Teases Return To ‘Fast & Furious’

“Love seeing this,” Johnson wrote on Twitter next to his video message. “Happy 100th Grandma Grover! I’m honoured you’re a fan and grateful you were born! Much love, Rock. (Wish my grandma was still around, but stuff like this is always the best part of fame).”

Happy Birthday Grandmom Grover!