Carys Zeta Douglas has become the latest addition to the fourth generation of the Douglas acting dynasty.
The couple already have a two-year-old son, Dylan
Catherine Zeta Jones' second baby with husband Michael Douglas replaces two-year-old Dylan Michael as the family's newest Hollywood star-in-waiting.
Carys enters a world destined to be defined by wealth and fame - and joins an illustrious Oscar-winning line-up of Douglas talent.
Michael has a 24-year-old actor son, Cameron, from a previous marriage - while Michael's father Kirk is still being cast at the age of 86.
Last month, Catherine secured the latest piece of Hollywood gold for the Douglas trophy cabinet with her best supporting actress Oscar for Chicago.
The Douglas clan is a model of the American dream rooted in Kirk's younger days in New York in the early part of the last century.
Born Issur Danielovich Demsky to Russian Jewish immigrant parents in 1916, he had waited on tables to finance his university education.
Zeta Jones married into Hollywood royalty
He also did odd jobs in the theatre and later trained at the Academy of Dramatic Arts - following a spell as a professional wrestler.
In 1946 one of his former classmates, actress Lauren Bacall, recommended him to producer Hal Wallis and his film career began.
Son Michael's break came in 1972 as a detective opposite Karl Malden in US TV drama The Streets Of San Francisco.
He spent years overcoming feelings of inferiority to his father, whom he idolised as a "gladiator".
The young Michael lived in a commune and dabbled in drugs, then dropped out of university and took a job as a petrol station attendant.
He later went back to college to study acting, although his father never believed he would make it.
He enjoyed his first major film success as a producer of the Oscar-winning 1975 film One Flew Over The Cuckoo's Nest.
The couple have an uneasy relationship with the media
As an actor Michael would go on to become every bit as successful as his father, with memorable roles in Romancing The Stone, Fatal Attraction, and his Oscar-winning performance as Gordon Gekko in Wall Street.
He met Catherine on the set of Steven Soderbergh's Traffic which won the best director award at the 2001 Oscars.
The Welsh actress had previously broken into Hollywood starring in the epic The Mask of Zorro in 1998.
The daughter of a former Swansea factory worker, she showed early talent as a dancer and singer.
Aged 15, she starred in the musical 42nd Street and went on to nationwide recognition through her TV role as Mariette Larkin in ITV's 1990s drama The Darling Buds Of May.
She honed her movie craft in films such as High Fidelity and Traffic, before striking gold with Chicago.
Her portrayal of the vampish Velma Kelly earned her a wealth of critical plaudits and the Academy Award.
Kirk Douglas was born to Russian Jewish immigrants
Michael's son Cameron stars with his father and grandfather Kirk in It Runs in the Family which opens in the US on Friday.
The first time the three generations have appeared in the same film, it tells of a dysfunctional New York family and their attempts at reconciliation.
There is no doubt that Carys and brother Dylan have been born into a life of privilege - and the unavoidable media attention that goes with being a Douglas.
Their famously privacy-loving parents, fresh from their High Court case against Hello! magazine, will try to shield their children from the worst excesses of the paparazzi.
The couple were recently reported to be furious that tour operators were offering holidaymakers coach trips to view their home in Majorca.
A more secluded hideaway is The Prince Maurice hotel on Mauritius, where the couple are regular guests.
Said to be among the island's most private hotels, its thatched suites sit on stilts overlooking a lagoon.
In an interview two years ago, Catherine spoke of her fears for son Dylan's privacy.
She said: "In two years' time I want to be able to take my son to the park and not have to explain why 20 people with cameras are running after us.
"I hope the frenzy will die down so he won't have to sacrifice the good things just because photographers are documenting his every move."