Dwayne Johnson has surprised a 100-year-old superfan by sending her an adorable personal birthday message.

The Hollywood star recorded a video of himself singing happy birthday to Marie Grover, who has been a fan since his days as a WWE wrestler.

“I'm sending you so much love and a huge congratulations on 100 years. What an amazing life. I, and I'm sure sure everyone around you right now, am very happy you were born and I'm so happy and honoured to send you this message: Marie Grover, happy birthday," Johnson said. “Now you can eat cake, you can get drunk, you can have the best time, party hard. I'm sending you so much love."

Marie was really excited. “Love you right back, you Rock you," she said.

The video came together thanks to a family friend, Jamie Klingler, who sent tweets to the Jumanji actor and tried to get in touch with him via a friend of a friend to see if he could do something for Grandma Grover on her 100th birthday.

Eventually Johnson spotted one of the tweets and replied. “First I'm hearing of this! Who's turning 100? Beautiful age! What do you need?" he said.

Klingler, whose best friend is Marie's granddaughter, said the video was the perfect birthday present.

“When we were in high school and were trick-or-treating she was always in a Rock sweatshirt," she told PA. “She was going on and on about how handsome he was, saying 'I wouldn't kick him out of bed'."

And it seems the centenarian is reveling in her new viral fame.

“She's been lapping it up," Klingler said. “She's like 'better late than never that I become famous.' That's who she is – she wears purple shoes, she's always dancing. She's been an amazing force in my life."

Each country has it's own traditions.

We are all crying, Kate.

His fans truly are the best.

Others are hoping for their own gift.

We're all hoping Grandmom Grover has many more birthdays like this.