Kate Middletonisn’t the only tennis fan in the family!

The Duchess of Cambridge’s siblings, younger sisterPippa Middletonand younger brotherJames Middleton, joined up for a siblings’ day out at Wimbledon on Monday.

“Protocol – dress is smart, suits/jacket and tie, etc. Ladies are asked not to wear hats, as they tend to obscure the vision of those seated behind them,” according to Wimbledon’sdescription of the royal boxon their website.

James, 32, looked sharp in a grey suit paired with a light blue shirt and navy tie. Both siblings wore sunglasses as they took in the tennis tournament.

Pippa and James Middleton.Neil Mockford/GC Images

Pippa Middleton and James Middleton

Pippa Middleton.Karwai Tang/Getty

Pippa Middleton

Just like Kate, Pippa and James (as well as their parents!) have been staples at Wimbledon over the years. Back in 2012, Pippa and Kate even attended the tournament together.

And the Middletons don’t just watch the sport — they’re all avid players as well. Pippa even said shecontinued to swim, play tennis and keep up with her barre workoutsduring her pregnancy.

James Middleton and Pippa Middleton.Clive Brunskill/Getty I

Pippa Middleton and James Middleton

The royal mom of three — who sported a white shirt dress with buttons down the front accessorized with an Alexander McQueen belt, chic sunglasses and her signature blowout — later headed to Centre Court where she then took her iconic seat in the front row of the royal box to see Tatjana Maria play Angelique Kerber.

Kate Middleton.Karwai Tang/Getty

Catherine, Duchess of Cambridge

Catherine, Duchess of Cambridge

Kate is also patron of the All England Lawn Tennis and Croquet Club, which hosts the world’s most prestigious annual tennis champion.

source: people.com