Michael Douglas' eldest son welcomed a daughter with his girlfriend, yoga instructor Viviane Thibes, on Monday, sharing the good news via Instagram.
"Today my appreciation for Mother’s all over the world has reached new heights...today I took part in a miracle as my baby girl was introduced to the world through a beautiful Amazon warrior...I’m so proud of you," he wrote alongside a photo of Viviane in a yoga pose with her very pregnant belly exposed. He also added the hashtag, "#iloveyou."
Earlier this month, ET caught up with Cameron at the premiere of his step-mother Catherine Zeta-Jones' new movie, Cocaine Godmother, where the 39-year-old actor spoke about what he was most excited about as an impending father.
"I'm really looking forward to it, and I think it's going to be more inspiration and drive to really try to put a nice life together for my daughter," he said, adding that though the couple had been thinking of names at the time, they were keeping them to themselves.
See photos of Cameron and Michael Douglas together:
404806 04: Actor Michael Douglas (R) and his son Cameron Douglas arrive at the Conde Nast Traveler Hot List party at the W Hotel May 1, 2002 in New York City. (Photo by Mark Mainz/Getty Images)
Kirk Douglas, Anne Douglas, Diandra Douglas, Cameron Douglas, and Michael Douglas (Photo by Ron Galella, Ltd./WireImage)
Michael Douglas, Cameron Douglas, and Diandra Douglas (Photo by Ron Galella/WireImage)
Michael & Cameron Douglas during Holyfield v. Tyson II in Las Vegas, Nevada, United States. (Photo by Jeff Kravitz/FilmMagic, Inc)
UNITED STATES - MAY 26: Diana Douglas Darrid with her grandson Cameron Douglas (l.) and her son Michael Douglas (r.) attending book party for Darrid's 'In The Wings: A Memoir' at Sardi's. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
UNITED STATES - MARCH 15: Actors Lou Gossett Jr., Michael Douglas and son Cameron Douglas (l. to r.) watch as the New Jersey Nets defeat the Miami Heat, 97-78, at the Continental Airlines Arena. (Photo by Howard Earl Simmons/NY Daily News Archive via Getty Images)
Michael Douglas, mother, and son Cameron Douglas (Photo by Jim Smeal/WireImage)
NEW YORK - DECEMBER 17: (ITALY OUT) Cameron, Kirk and Michael Douglas stand in front of Cipriani's Restaurant December 17, 2002 in New York City, New York. (Photo by Arnaldo Magnani/Getty Images)
LOS ANGELES - APRIL 7: Actor/producer Michael Douglas (L) and son actor Cameron Douglas arrive at the premiere of 'It Runs In The Family' at the Bruin Theater on April 7, 2003 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
NEW YORK - APRIL 13: (U.S. TABS & HOLLYWOOD REPORTER OUT) (L to R) Diana Douglas, Kirk Douglas, Michael Douglas and Cameron Douglas arrive at the New York premiere of 'It Runs In The Family' at the Loews Lincoln Square Theater April 13, 2003 in New York City. (Photo by Scott Gries/Getty Images)
Cameron Douglas and Michael Douglas (Photo by Mark Sullivan/WireImage)
PROVIDENCIALES TURKS AND CAICOS ISLANDS, BWI- JANUARY 05: ***PREMIUM PRICING;USAGE IN POSITIVE STORY ONLY;GETTY IMAGES EXCLUSIVE;TABLOIDS OUT*** Actor Michael Douglas, actress Catherine Zeta-Jones with Cameron Douglas and his girlfirend Kelly Sotton Dellis Cay on Turk and Caicos while on holiday in the Caribean January 5, 2007 in Providenciales Turks and Caicos Islands. (Photo by Frazer Harrison/Getty Images).
CULVER CITY, CA - MARCH 06: Cameron Douglas, actor Michael Douglas and actress Catherine Zeta-Jones attend Kirk Douglas' one man show 'Before I Forget' at The Kirk Douglas Theatre on March 6, 2009 in Culver City, California. (Photo by Jason LaVeris/FilmMagic)
April 27, 2009 Hollywood, Ca.; Cameron Douglas and Michael Douglas; 'Ghosts of Girlfriends Past' World Premiere; Held at Grauman's Chinese Theatre (Photo by Gregg DeGuire/FilmMagic)
Actor Michael Douglas and Cameron Douglas attend a performance of Hairspray on October 23, 2002 at the Neil Simon Theater in New York City. (Photo by Ron Galella, Ltd./WireImage)
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As for Michael, he was also looking forward to a major new role: grandparent.
"I'm going to be a grandfather this month, before the end of the year. I'm very excited. It's about time," the 73-year-old actor told ET at the premiere.
Though Cameron has had a rough few years, he seems to have turned things around since being released from prison early in August 2016 after serving nearly seven years on drug charges. In fact, he and Viviane happily shared many posts to Instagram during the pregnancy.