Arnold Schwarzenegger's son turns 20 this year and his role model father has a lot to say about his young lad.

Its Christopher Schwarzenegger's birthday and dad Arnold couldn't stop posting a throwback picture of the duo together.

In his tweet, Arnold called Christopher a great student, kind soul, and a fantastic son and added how proud he felt about him.

However, there have been no reports of Christopher celebrating his birthday with his mighty father.

Christopher was last photographed in the month of April sporting a blue shirt, board shorts and trainers in Beverly Hills after he left native Los Angeles for the Midwest and enrolled at the University of Michigan. According to Dail Mail, he had been spotted spending quality time with family having a casual lunch with mother Shriver and sister Katherine.

His parents Arnold and Maria split back in 2011 after reports of Arnold's illegitimate child born to his then-housekeeper Mildred Baena and it took eight years for Arnold to realize about his own offspring's whereabouts. Arnold revealed this last year while promoting his book ' Total Recall: My Unbelievably True Life Story'.

During the promotion, Arnold had mentioned how important his children were for him. According to Mirror Uk , Arnold spoke for over 60 Minutes as he opened up about his love for his marriage and family. He blamed himself and called his divorce with Shriver a failure.

At the moment Christopher's mighty man seemed to have reconciled with his family and was spotted chatting with wife at Christopher's high school graduation last year. Arnold even celebrated Katherine's Birthday in December last year, which Christopher missed as he was in Los Angeles. Now the father-son duo might be up for a big birthday bash and they can't wait to see what's coming next.