Pippa Middleton was spotted out with boyfriend Nico Jackson at the glamorous Boodles Boxing Ball on Saturday.

The Duchess of Cambridge's sister, who is rumored to be engaged to her beau, joined the likes of Princess Beatrice (as well as her boyfriend Dave Clark), Princess Eugenie, Prince Harry, Cressida Bonas and Zara Phillips for a fun night out.

The Vanity Fair columnist and her stockbroker boyfriend held hands and smiled as they made their way into the Grosvenor House Hotel.

Middleton wore a floor-length dress by Catherine Deane, which consisted of a black halter neck top and a bright tangerine skirt that showed off her fresh tan, according to HELLO! magazine.

The 30-year-old accessorized with black peep toe shoes along with a black clutch bag. She wore her brunette hair in elegant loose curls while Jackson, 35, looked dapper wearing a black velvet jacket, a black suit and bow tie.

The magazine reported that in the past, Kate Middleton usually takes center stage at the Boodles Boxing Ball, with all eyes on her.

Before marrying Prince William, the Duchess of Cambridge attended the ball twice. Once with a revealing pink gown and again with a low-cut sky blue dress.

Meanwhile, Princess Beatrice decided to cover up while making her return to the spotlight after taking some time to fulfil her royal duties.

According to the Daily Mail, Princess Beatrice, 25, turned up the ball with her boyfriend, who she is rumored to be engaged to, 31-year-old Virgin Galactic businessman Dave Clark.

The royal wore a sequin cropped jacket over a cream chiffon dress with platform heels.

Princess Beatrice has flown under the radar since rumors began to surface the she was engaged to boyfriend Dave Clark.

However, the royal attended the Royal Hospital for Sick Children in Edinburgh (RHSC) on Thursday, debuting her first official appearance since becoming the official Royal Patron of The Sick Kids Friends Foundation in July.

Beatrice visited the young inpatients, parents and staff at the hospital as well as met with trustees of the charity that supports the hospital.

However, when the weekend hit, the Princess decided to go glamorous for her Boodles Boxing Ball appearance.

For photos of Princess Beatrice and Dave Clark as well as Pippa Middleton and Nico Jackson click HERE.