Marion Ross, the matriarch of the Happy Days family, will always see Ron Howard as her TV son.
And like all good sons, Howard tweeted an adorable birthday greeting for his dearest sitcom co-star.
"Happy Birthday Marion!" Howard wrote in an October 25 Twitter post, calling Ross the "World's greatest TV Mom and World's greatest friend! Love Ron."
Marion Ross, who also shared her name with her Happy Days maternal character, Marion Cunningham, celebrated her 90th birthday on October 25.
Others joined Howard in sending Marion some birthday love.
The former TV mom is still gracious after all these years.
She is truly one of America's favorite mom.
Former child actor Ron Howard was a 20-year-old when he starred as the teenage Richie Cunningham on the popular period sitcom depicting suburban life in the 1950s.
The Milwaukee-set series ran from January 15, 1974, to September 24, 1984, on ABC and ran for eleven seasons.
Marion was born in Watertown, Carver County, Minnesota on October 25, 1928. She knew she was destined to be an actress from an early age.
Fun fact: when she was 13, she changed the spelling of her name from Marian to Marion because she thought it would look better on a marquee.
That is the kind of confidence that put her on a promising trajectory.
Her family eventually made their way to San Diego, California, where Marion graduated from Point Loma High School.
She then enrolled in San Diego State University where her talents gave her the distinction of being the school's outstanding actress.
Work in community theater after graduating in 1950 caught the attention of a theater director who suggested the actress aim higher for TV and film.
She never looked back since.
After Happy Days, Marion continued her successful career, starring in movies like The Evening Star (1996), for which she received a Golden Globe nomination for Best Supporting Actress.
She hasn't slowed down. She's kept herself busy with recurring guest spots on television shows like That '70s Show, Gilmore Girls, and Brothers & Sisters.
Happy birthday, Marion!
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