Arnold Schwarzenegger is celebrating his 75th birthday! The actor and politician received tributes and posts from his loved ones, including his daughter, Katherine Schwarzenegger, and her husband, Chris Pratt.The odd reason Arnold Schwarzenegger is not Miriam Margolyes’s favorite co-starArnold Schwarzenegger says his accent removal coach should ‘give him his money back’A post shared by Katherine Schwarzenegger (@katherineschwarzenegger)Katherine shared adorable photos of herself and her dad in different situations over the years. One includes them atop horses, while Katherine smiles at the camera and her dad gives her bunny ears. Another shows the two in the pool and the last image is much more recent, showing Schwarzenegger in grandpa mode, holding his granddaughter.