Katherine Schwarzenegger and brother Patrick wish 'our hero' Maria Shriver a ...

Katherine Schwarzenegger and brother Patrick wish 'our hero' Maria Shriver a ...
Katherine Schwarzenegger and brother Patrick wish 'our hero' Maria Shriver a ...

Katherine Schwarzenegger led the charge when it came to wishing mom Maria Shriver a happy 66th birthday on Saturday. 

The 31-year-old podcast host and author penned a gushing tribute to her 'hero' and 'rock' Maria, while brother Patrick Schwarzenegger, 28, called her 'my everything.' 

Both shared snaps of memories with the matriarch throughout the years and looked to be celebrating that evening with an elegant party at her Brentwood estate. 

Throwback! Katherine Schwarzenegger celebrated mom Maria Shriver on her 66th birthday with a gushing tribute to 'our hero, our rock' and a handful of throwback snaps throughout the years

Throwback! Katherine Schwarzenegger celebrated mom Maria Shriver on her 66th birthday with a gushing tribute to 'our hero, our rock' and a handful of throwback snaps throughout the years 

Momma's boy: 'Happy birthday to my everything Mommas boy to the max.Love you to the moon & back' wrote the Midnight Sun actor

Momma's boy: 'Happy birthday to my everything Mommas boy to the max.Love you to the moon & back' wrote the Midnight Sun actor

 'Happy birthday to the Queen!' wrote the wife of Chris Pratt while thanking her for being the best 'mama' and 'mama g' to their daughter Lyla Maria, 13 months. 

'I love you more than you know! You're the best mama and mama g and all around human! We celebrate you today and always! Our hero, our rock, our guiding light! Happy happy!!'

Several posts showed the mommy-daughter duo over two decades ago, including one snap with a horse and one formal portrait,  and other images showed precious moments taken during their travels over the years. 

Another image displayed a rare glimpse at her daughter Lyla while the former First Lady of California, cradled her at sunset in Coeur d'Alene, Idaho. 

Lake days: A few snaps dedicated to Maria appeared to be taken during a family vacation in Coeur d'Alene, Idaho

Lake days: A few snaps dedicated to Maria appeared to be taken during a family vacation in Coeur d'Alene, Idaho 

Great outdoors: The post was full of smiling selfies of the mommy-daughter duo as Katherine called her 'the queen'

Great outdoors: The post was full of smiling selfies of the mommy-daughter duo as Katherine called her 'the queen'

Irreplaceable: In another image the Before, During, and After host shared a formal portrait taken with her mom when she was a tot

Irreplaceable: In another image the Before, During, and After host shared a formal portrait taken with her mom when she was a tot

Oldest son Patrick also paid tribute to his mother: 'Happy birthday to my everything Mommas boy to the max.Love you to the moon & back.' 

The Midnight Sun actor posted a few stunning snaps of best-selling author out in nature during various family vacations, and also shared a look at preparations for an intimate at-home celebration. 

The backyard celebration will assumably be attended by close friends of the family as well as all four kids: Katherine, Patrick, Christina, 30, and Christopher, 24 who she shares with ex-husband Arnold Schwarzenegger. 

In Patrick's post he flashed a glimpse at his very trim younger brother as he remarked 'my dawg in better shape than me.' 

Rare glimpse! The wife of Chris Pratt called Maria 'the best mama g' to their daughter Lyla Maria, 13 months

Rare glimpse! The wife of Chris Pratt called Maria 'the best mama g' to their daughter Lyla Maria, 13 months

Stunning sunset: The elegant mother of four was seen in a summery outfit as she took in the sunset over the lake in Idaho

Stunning sunset: The elegant

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