It seems that Dwayne Johnson's heart is even bigger than those muscles.

The action hero better known as The Rock cooked up quite a surprise for a faithful employee. Over the weekend, the hulking "Fast & Furious 7" star presented his housekeeper with a new car!

10yrs she's looked after our home like a loving mama. Just surprised Esperanza with a new ride! #WeLoveU pic.twitter.com/wzqQo3n1zq — Dwayne Johnson (@TheRock) January 18, 2014

"The shocked look on her face was priceless," the actor — who was the top-grossing actor of 2013, according to Forbes — added on Instagram, where he had a few more characters to describe the same pic showing the megastar casually dressed in a tank top and shorts and hugging an elated Esperanza as they posed next to her wheels.

[Related: The Rock Shows Us His Crazy Buff Bod … From When He Was 15!]

The sweet new ride is a Ford Edge Limited in Deep Impact Blue, according to a spokesperson for the car company. The midsize SUV is likely a 2013, and ranges in price from about $31,500 to over $40,000.

Johnson also purchased a new car — a Cadillac — for his mom in 2012, explaining, "At 14, I saw my mom crying about our only car being repossessed. This felt good. Merry Christmas mom."

The superstar rose to fame as a wrestler before crossing over to movies, but, despite being known for his brawny bod, he has quite a generous spirit. A quick scroll through his Instagram photos shows him greeting many of his fans, often at the gym, including some with special needs. He does a lot of that through his Dwayne Johnson Rock Foundation, which benefits terminally ill and at-risk children.

Last year, he also visited a prison to speak with some inmates about changing their lives. Johnson, who was arrested multiple times as a teen, challenged them to commit themselves to being better.

His generosity has also extended to his alma mater, University of Miami. Last year, he was given the school's Edward T. Foote, II Alumnus of distinction award for his numerous donations, which were reportedly the largest even given to Miami's athletic department by a former student. In August, the school dedicated a football locker room to him.

The Rock isn't the only generous star employer. Last month, Jennifer Hudson made headlines when she purchased a house — yes, a house! — for her assistant for Christmas.