Who Is Stephanie Phillips? Meet Peter and Zara’s Half-Sister

by Chief Editor

As Peter Phillips prepares to marry Harriet Sperling on Saturday, June 6, 2026, at All Saints’ Church in Gloucestershire, the guest list reflects the complex family dynamics of the Royal Family. While high-profile royals like King Charles, Queen Camilla, and the Prince and Princess of Wales are expected to attend, the event also highlights the distinction between Peter’s close-knit siblings and his more distant family members.

Who is Stephanie Phillips?

Stephanie Phillips is the daughter of Captain Mark Phillips and his second wife, American equestrian Sandy Pflueger. Born in 1997, she is the half-sister of Peter Phillips and Zara Tindall. Unlike her older half-siblings, Stephanie has maintained a life that, while rooted in the same equestrian circles—including serving on the jury for the 2016 Olympics’ dressage and eventing competition—remains largely outside the intense royal spotlight. She has a history of participating in family milestones, having served as a bridesmaid at both Peter’s 2008 wedding to Autumn Kelly and Zara’s 2011 wedding to Mike Tindall. In 2022, Peter and Zara attended her wedding to William Hosier, where their children served as bridesmaids.

Did you know?
Stephanie Phillips is 20 years younger than her half-brother Peter and 16 years younger than her half-sister Zara.

The Status of Felicity Tonkin

While Stephanie Phillips remains a recognized part of the family, Felicity Tonkin represents a different branch of the Phillips family tree. Born in 1985 to Captain Mark Phillips and New Zealand art teacher Heather Tonkin, Felicity’s existence became public in 1991 following DNA testing. According to reports, Felicity has never met Peter or Zara. Despite being their half-sister, she was not present at Peter’s 2008 wedding or Zara’s 2011 marriage. Sources indicate that she has chosen to lead a private life in New Zealand as a specialist equine veterinarian and is unlikely to be among the guests at the upcoming wedding in Gloucestershire.

From Instagram — related to Peter and Zara, Captain Mark Phillips

Comparative Overview of the Phillips Siblings

Sibling Relationship Status
Stephanie Phillips Maintains a close relationship with Peter and Zara; has participated in previous family weddings.
Felicity Tonkin Does not have a relationship with Peter or Zara; has reportedly never met them.

Frequently Asked Questions

Will Felicity Tonkin attend Peter Phillips’ wedding?

No. Reports consistently indicate that Felicity Tonkin has no relationship with her royal half-siblings and is not expected to attend the wedding.

Frequently Asked Questions

Is Stephanie Phillips expected to be at the wedding?

While there is no official guest list, it is widely speculated that Stephanie, who has historically been close with her siblings, will be in attendance to support her brother.

What is the professional background of the Phillips siblings?

Both Stephanie Phillips and Felicity Tonkin share their father’s passion for horses. Stephanie has served as a competition jury member, and Felicity is a specialist equine veterinarian.

Pro Tip:
When following royal events, look for the distinction between official state guests and private family members; the latter often provide the most insight into the personal dynamics of the family.

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Zara Tindall has a half sister who is also an equestrian, who is Stephanie Phillips

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