The 15-year-old took centre stage with her mum and uncle Albert at the International Circus Festival this week.
And all eyes were on the youngster, who has a thick mane of long brunette hair just a shade lighter than her mum's and has shot up in height over the last 12 months. She is now on equal footing with her mother, who stands at just over 5ft 6in.
Pauline is one of two children Stephanie had with her former bodyguard Daniel Ducruet. The princess fell for the dashing bodybuilder when he accompanied her on a tour to promote her music album in the early Nineties.
The two welcomed Pauline two years after her brother Louis was born - and married in 1995, but divorced a year later.
Stephanie went on to welcome another child, daughter Camille Marie Kelly Grimaldi in July 1998.
Mystery surrounds the father of the little girl, named in honour of Stephanie's screen actress mother Grace Kelly.