It's hard to believe the Rocky legend turned 70 on Wednesday.

But Sylvester Stallone is making sure he really enjoys his milestone birthday as he continues his celebration with his family in the South of France.

On Saturday, the Hollywood star, his glamorous wife Jennifer Flavin, 47, and their three beautiful daughters were spotted boarding a mega-yacht in Monte Carlo.

Still the champ: Sylvester Stallone is enjoying a luxury European vacation to celebrate turning 70 last Wednesday and on Saturday the party continued on board a luxury yacht in Monte Carlo

The actor, looking decades younger than his actual age, showed off his barrel chest and muscled arms in a blue short-sleeved polo shirt and blue Nike shorts plus white sneakers as he carried his bag onto the yacht.

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Jennifer, also carrying a small bag of luggage, looked cute in a white T-shirt and dark blue shorts.

The couple are doting parents to their three girls: Sophia, 19, Sistine, 17, and Scarlet, 13.

All aboard! The Hollywood star was spotted carrying some hand luggage with him onto the vessel moored in the harbor of the swanky enclave on the Mediterranean 

Ready to set sail: Sly's 47-year-old wife, former model Jennifer Flavin, seemed really excited as she walked the gangplank to the yacht with her bags

Darling daddy: The iconic star was surrounded by his beautiful daughters - Sophia, 19, left, 13-year-old Scarlet, center, and Sistine, 17 

Sophia opted for Daisy Dukes and a cropped, white off-the-shoulder peasant blouse

Sistine went for white denim shorts and a low cut white T-shirt.

And Sly's youngest, Scarlet, also chose white denim shorts that she paired with a white vest with buttons down the front.

Close family: The actor placed a loving arm around his eldest girl Sophia as she knelt on a deck chair wearing tiny denim shorts and an off-the-shoulder crop top

Gorgeous gals: While Sophia opted to bare her midriff in a skimpy outfit, sister Scarlet wore a long tank top with buttons at the neck and a pair of distressed white cotton shorts

Gracious hostesses: The sisters greeted guests who arrived to help them celebrate their famous father's birthday on board the luxury yacht 

The family's friends joined them on board and they soon broke out the bubbly for a party on deck.

Sly looked in great spirits on his laid-back getaway before the yacht upped anchor and sailed away into the sunset.

The busy star has four projects lined up when he returns to Hollywood , including a role in Guardians Of The Galaxy Vol. 2.

Man of the moment: Sly was the life and soul of the party as he and his guests enjoyed a little wine

Nice ride: The Stallones boarded this yacht for a cruise around the south coast of France near Monte Carlo

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