The granddaughter of the Hollywood actress turned Monegasque princess Grace Kelly has been celebrating her 20th birthday in style in Monte Carlo.
To mark the occasion on Sunday Camille Gottlieb, the daughter of Princess Stephanie of Monaco, decamped with friends to a hotel appropriately located on the Avenue Princess Grace – named for her grandmother and often vaunted as the world’s most expensive street.
The now 20-year-old – who is often compared to Grace Kelly by fans of the Hitchcock blonde – has been sharing snaps of the celebrations on her Instagram feed, which show her posing in a bikini and an inflatable crown as her pals lounge on pool floats in the background, and jumping on the bed in her hotel suite wearing a t-shirt emblazoned with 1998, the year she was born.
The group were staying in Le Meridien Beach Plaza in Monte Carlo, the only resort on the uber-exclusive strip of Mediterranean coastline with a private beach.
A bikini clad Camille Gottlieb, whose mother is Princess Stephanie of Monaco, poses in an inflatable crown in an Instagram snap on her 20th birthday
![Grace Kelly's granddaughter, seen left, has been partying up a storm to mark her 20th birthday](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A2500000578-5961671-Grace_Kelly_s_granddaughter_seen_left_has_been_partying_up_a_sto-a-25_1531815271969.jpg)
Grace Kelly’s granddaughter, seen left, has been partying up a storm to mark her 20th birthday
![Camille, seen in an Instagram snap, is often compared to her late grandmother, Grace Kelly](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550F0800000578-5961671-Camille_seen_in_an_Instagram_snap_is_often_compared_to_her_late_-a-24_1531815265347.jpg)
![Grace Kelly, seen in 1955, is the grandmother of Camille Rose Gottlieb](https://i.dailymail.co.uk/i/newpix/2018/07/17/10/1291F2C0000005DC-5961671-Grace_Kelly_seen_in_1955_is_the_grandmother_of_Camille_Rose_Gott-a-39_1531821221399.jpg)
Grace Kelly fans have pointed out Camille’s resemblance to the Hollywood icon turned Monegasque royal, her late grandmother
Another candid snap Camille shared with her social media following captures the blonde frolicking in a swimming pool with a friend.
Camille is Princess Stephanie’s youngest child, and although her father’s identity has never been publicly confirmed, he is understood to be Jean-Raymond Gottlieb, a former Paris Gendarme, ski instructor, and palace guard at the Palais Princier in Monaco.
Gottlieb was Princess Stephanie’s head of security but resigned when they became a couple for a time.
Princess Stephanie is also mother to Louis Ducruet, 25, and Pauline Ducruet, 24, with her ex-husband Daniel Ducruet, whom she divorced in 1996 after four years together.
She gave birth to Camille two years after her marriage split.
Pauline, who recently put in a series of glamorous appearances at the couture shows in Paris, posted a sweet throwback snap of herself and Camille as children to mark her half-sister’s birthday.
![Wearing a 1998 slogan tee - the year she was born - Camille leaps on to the bed in her hotel suite for a playful Instagram snap](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A1900000578-5961671-Wearing_a_1998_slogan_tee_the_year_she_was_born_Camille_leaps_on-a-23_1531815259181.jpg)
Wearing a 1998 slogan tee – the year she was born – Camille leaps on to the bed in her hotel suite for a playful Instagram snap
![The granddaughter of the Hollywood icon celebrated her 20th birthday over the weekend](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A1D00000578-5961671-The_granddaughter_of_the_Hollywood_icon_celebrated_her_20th_birt-a-22_1531815251796.jpg)
The granddaughter of the Hollywood icon celebrated her 20th birthday over the weekend
![Having apparently teamed up with a friend for a joint bash, Camille captioned this snap: 'Happy birthday to us'](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A0D00000578-5961671-image-a-15_1531814963604.jpg)
Having apparently teamed up with a friend for a joint bash, Camille captioned this snap: ‘Happy birthday to us’
![](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A1100000578-5961671-image-m-37_1531816686794.jpg)
![Enjoying the pool at Le Meridien hotel in Monte Carlo - situated on a road named after Camille's grandmother - the duo posed in inflatable crowns](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A1100000578-5961671-Enjoying_the_pool_at_Le_Meridien_hotel_in_Monte_Carlo_situated_o-a-21_1531815240028.jpg)
Enjoying the pool at Le Meridien hotel in Monte Carlo – situated on a road named after Camille’s grandmother – the duo posed in inflatable crowns
![Camille was flooded with birthday messages on Instagram, including one from her older half sister Pauline Ducruet, 24, Princess Stephanie's daughter with her ex-husband Daniel Ducruet, who shared this sweet throwback snap of the siblings as children](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/4E550A3D00000578-5961671-Camille_was_flooded_with_birthday_messages_on_Instagram_includin-a-20_1531815227799.jpg)
Camille was flooded with birthday messages on Instagram, including one from her older half sister Pauline Ducruet, 24, Princess Stephanie’s daughter with her ex-husband Daniel Ducruet, who shared this sweet throwback snap of the siblings as children
![Camille's mother is Princess Stephanie of Monaco, the daughter of Grace Kelly and Prince Rainier III](https://i.dailymail.co.uk/i/newpix/2018/07/17/09/04F42A490000044D-5961671-image-a-38_1531817946637.jpg)
Camille’s mother is Princess Stephanie of Monaco, the daughter of Grace Kelly and Prince Rainier III
She captioned the snap: ’20 / MEMORIES / TWINNING.’
Pauline is based in New York while Camille lives in Monaco, but the half-sisters regularly crop up on one another’s Instagram feeds.
Louis Ducruet, meanwhile, recently became engaged to his college sweetheart, Marie Chevallier, who once worked as a cashier at a French discount supermarket.
Louis, who has no title but is 12th in the line of succession to the Monegasque throne, will become the first of Princess Stephanie’s children to tie the knot.