Hard to believe, but Opie is a grandpa! Ron Howard, the Oscar-winning filmmaker, who also starred as Richie Cunningham in "Happy Days," became a grandfather when his eldest daughter, actress Bryce Dallas Howard, gave birth to her first child, son Theo Gabel (seen here). Sources say there is a strong family resemblance between Theo and Papa Ron; the little man has some "Opie" in him and is reportedly a spitting image of his grandpa! Ron and his wife Cheryl are also parents to 23-year-old twin girls, Jocelyn Carlyle and Paige Carlyle, and 21-year-old son Reed Cross.
Goldie Hawn is a grandma to two boys: Ryder Russell Robinson, now 5 (seen here), from her daughter Kate Hudson's marriage to Black Crowes rocker Chris Robinson, and to Wilder Brooks Hudson, who turns 2 this summer, from her son Oliver Hudson's marriage to actress Erinn Bartlett.
Now past the age of 60, rock legend -- and proud grandpa -- Steven Tyler and Aerosmith are still going strong. Tyler's daughter, actress Liv Tyler, has one son, 4-year-old Milo, from her marriage to Royston Langdon.
Actress Blythe Danner, mother to Oscar-winning actress Gwyneth Paltrow, is the proud grandma of two grandchildren -- granddaughter Apple, turning 5 this spring (seen here), and grandson Moses, 3. Their dad is Paltrow's husband, Coldplay lead singer Chris Martin.
Here's to you...first grandma Mrs. Robinson! President Barack Obama's mother-in-law, Marian Robinson, has two children -- First Lady Michelle Obama and son, Craig Robinson. Mrs. Robinson currently lives in the White House with her daughter, where she helps care for her two granddaughters -- Malia, 10, and Sasha, 7.
Saul Loeb, AFP / Getty Images
Fans remember Donny as the young star they grew up watching in the '60s and '70s -- but Osmond is now a grandfather of two! Osmond became a first-time grandpa in 2005, when his second son Jeremy and his wife Melisa welcomed Dylan James Osmond. The family welcomed a granddaughter, Emery, in 2008. This is the first girl born into Donny's immediate family, as he is father to five boys.
Kevin Mazur, WireImage
A celebrated film and television actress, currently starring in the TV series "Brothers and Sisters," Sally Field has three grandchildren. In 1998, she became a grandmother of Isabel Craig; in 2001, Sophie Craig; and in 2006, Noah Craig (seen here).
Priscilla Presley is still celebrating the arrival of her newest grandchildren by daughter Lisa Marie Presley this past fall. Fraternal twin girls, Harper and Finley (dad is Lisa Marie's husband Michael Lockwood), join siblings Danielle Riley and Benjamin Storm from Lisa Marie's marriage to Danny Keough.
Jason Merritt, FilmMagic
Award-winning actor Dustin Hoffman has two children (Karina and Jenna) with his first wife Anne Byrne, and four more (Jacob, Maxwell, Rebecca and Alexandra) with wife Lisa Gottsegen. Hoffman also has two grandchildren -- he is seen here with granddaughter Daisy Jo.
Marsaili McGrath, Getty Images
Veteran film actor Harrison Ford -- best known for his starring role in the "Indiana Jones" franchise -- has four children from two previous marriages and three grandchildren. Ford's first grandson, Eliel, was born in 1993, his granddaughter, Giuliana, in 1997 and his second grandson, Ethan, in 2000.
Jeffrey Mayer, WireImage