"I typically recommend if someone is married, engaged, considers themselves to have a serious significant other, or is traveling in for the wedding, they should receive a plus one".
And while Kate is married to a future king, Pippa's fiancé isn't doing badly himself as well.
But as her big day approaches, Daily Star Online can reveal odds are being offered on her bearing her derriere yet again in an even tighter dress. The royal finished off her look with simple drop earrings and her gorgeous sapphire engagement ring.
To accessorise, Kate opted for an embellished clutch bag and a pair of taupe stilettos that lengthened her legs.
She advises a see-through garment, that clings tightly to the 33-year-old's body.
James, 28, and Donna, 36, started dating in February 2013 and have been pictured out and about together numerous times, with Donna often enjoying nights out with his sister Pippa.
The Duchess of Cambridge has revealed she is a little anxious about how her children will behave at her sister Pippa Middleton's wedding at the weekend.
Although the world is most excited to see bride Pippa's sure-to-be gorgeous gown as well as the Duchess' of Cambridge's ensemble, anticipation is also high for Meghan's top-secret outfit.
People who simply can't stand the thought of any potential outbursts at their wedding simply shouldn't invite children. Twitter users have called out some of Pippa Middleton's wedding demands. Following her appearance at the royal wedding, her writing career went up a gear.
Meghan Markle has arrived in the United Kingdom ahead of joining boyfriend Prince Harry at Pippa Middleton's wedding this weekend. Whereas,
Pippa and her pals reportedly celebrated her "hen party" in the French Alps in April. The designer has denied the rumors. James, as the elder son, will inherit David's title, and Pippa, as his soon-to-be wife, will become Lady of the Glen Affric. This comes after a woman was photographed carrying a white garment bag into Pippa's home. However, though Pippa served as maid of honor to their mother, Kate, it is not known yet how the Duchess will participate in the ceremony. For months, there had been questions about whether Markle would get an invitation to Pippa's lavish nuptials, as her attendance would be seen as a sign that Harry is serious enough about Markle to make their relationship permanent.