Hollywood legend Kirk Douglas celebrated his 100th birthday on December 9th. He's had a career that spanned six decades. In the 1950s and 1960s he often starred in beefcake-heavy movies as Ulysses (1954), 20,000 Leagues Under the Sea (1954), The Vikings (1958), and Spartacus (1960).
His four sons and grandsons have followed in his footsteps.
Michael (born 1944) was a New Sensitive Man of the 1970s, starring in The Streets of San Francisco (1972-77), Romancing the Stone (1984), and The Jewel of the Nile (1985) before moving on to roles as middle-aged businessmen, cops, and lawyers. He's played gay characters several times, notably as Liberace (2013).
Joel (born 1947) is a film producer, mostly working on productions with his father and brother.
Peter (left, born 1955) is a tv producer with credits such as The Final Countdown (1980) and Something Wicked This Way Comes (1983)
Eric (1958-2004) was an actor and comedian. He died of an accidental drug overdose.
Michael's son Cameron (born 1978) has appeared in four films, including It Runs in the Family (2003). He spent five years in prison for drug dealing. Released in 2016, he is anxious to continue his acting career.
Here are two more Douglases. I don't know if they fit into the family or not.