Arnold Schwarzenegger Gets Pumped Up Birthday Messages from His Kids

The former Mr. Olympia has just finished his most important set yet, his 72nd birthday!!!

Arnold Schwarzenegger’s children took to social media Tuesday to display their love for their larger than life dad and shower him with wishes on his special day.

Joseph Baena shared a great photo of him and his buff pops Pumping Iron in the gym with the caption, “BIG happy birthday to the best training partner in the world! Love you dad."

The picture appears to feature a much younger Baena because he recently shared photos of himself striking some of his father’s famous bodybuilding poses.

His other son, Patrick Schwarzenegger also wished dad well on his special day.

The "Midnight Sun" star shared a picture of his kids surrounding him while he holds a birthday cake featuring a photo of himself.

Arnold has five children, 4 with Maria Shriver, Katherine, Christina, Patrick, and Christopher.

The actor publicly acknowledged his son Joseph in 2011, whom he fathered with the family maid, and since then has taken the boy under his wing ... especially when it comes to hitting the gym.

Joseph didn't appear to celebrate his dad's birthday with the rest of the Schwarzenegger family, but he did "Like" Patrick’s post, so it seems the brotherly love is strong.

Happy Birthday, Arnold!