Jamie Klingler wanted to do something special for her best friend's grandmother Marie Grover on her 100th birthday. 

Klingler described "Grandmom Grover" to Buzzfeed News as the "wonderful woman who enhanced my childhood and my life." She's also been a huge fan of Dwayne Johnson for the past 30 years. While Klingler knew it was a long shot, she wanted to at least try getting "The Rock" involved in what could be the greatest gift she has ever received on such monumental birthday. So she got to work by reaching out to Johnson's publicist and agent, but nothing was working until a tweet grabbed his attention.

When Grandmom Grover's 100th birthday finally arrived on Tuesday, Johnson surprised her with a special video message that included a personalized rendition of "Happy Birthday." 

"I am sending you so much love and a huge congratulations on 100 years," Johnson said. "What a wonderful life. Now you can eat cake. You can get drunk. Have a great time."

Happy 100th birthday, Grandmom Grover!