Happy Days' Henry Winkler makes 'unbelievable' revelation about former co-star Ron Howard

Happy Days' Henry Winkler celebrated his 81st birthday on October 30.

The star reflected on the incredibly thoughtful way that his former co-star Ron Howard makes his birthday extra special each year.

The duo have been friends since they met on set in the '70s, and Ron makes sure to let Henry know just how much he appreciates his over five decades-long friendship.

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Henry revealed to Good Morning America that Ron sends him "great birthday gifts" annually. He shared: "He sends me this unbelievable basket of cheese and crackers. He's so thoughtful."

The star emphasized their strong bond, adding: "You know, I met him when he was 18. I was 27."

Although he's very grateful for Ron always remembering his big day, Henry revealed that unfortunately, he doesn't share the same tradition. The star revealed: "Every year, I forget his [birthday]…I do."

He joked: "I know that it's on March 1st, but I never seem to send him cheese." This isn't the first time that Henry has gushed about Ron's gift-giving talents. During their time on set Ron introduced him to softball.

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He recalled to Fox News Digital: "I don't have good eye/hand coordination, so I was never a sports person except for water-skiing when I was younger. Ron bought me my first mitt and Anson Williams [who played Potsie on Happy Days] bought me my first bat for my birthday."

Henry continued: "They taught me to pitch softball on the sound stage in between scenes. I became very good at pitching. I couldn't hit very well. I couldn't catch very well. But it was a great accomplishment for me."

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Ron looked up to Henry, and he was his role model as he became an adult, while on set.

He revealed to People: "Henry's a few years older than I am. Yale educated, and he looked at acting in a way that was — it wasn't Hollywood. It was a little more intellectual. It was theater based, and that was new to me. But more than anything, we just got along beautifully and worked well together."

Ron added: "We clicked. We — Henry Winkler and I — clicked immediately, on a kind of professional level, but I also looked up to him."

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Henry may forget to gift Ron for his birthday, however, the star helped his younger co-star achieve his biggest dream, which was the greatest gift.

Ron revealed: "[Henry] played a hand in helping my dream ultimately come true, which was to be a studio, Hollywood, feature director."

The first film Ron directed along with Brian Grazer was Night Shift, which starred Henry. Ron continued: "He did us both a huge solid when he committed to that movie."