Geri Halliwell and Christian Horner make first post-engagement appearance

and her fiancé

stepped out together on Thursday for

. The love-up pair, who

, supported the

at Ghantoot Polo Club in Abu Dhabi. Dressed in a dusky pink lace dress, Geri stood arm-in-arm with her

, who sported a black blazer, beige trousers and suede shoes.

Geri and Christian made their first public appearance since getting engaged

Former Spice Girl Geri, who has been dating Christian since March, proudly wore

on her left hand.The bride and groom-to-be joined

,

and

at the sporty event.

, who set up Sentebale with Prince Harry in 2006, was also present at the match.Geri and Christian announced their engagement in the same traditional way that Benedict Cumberbatch and his fiancée Sophie Hunter chose to – in the Births, Marriages and Deaths section of

.

The couple were seated with Prince Harry at a dinner following the polo cup

read the listing. "The engagement is announced between Christian, son of Mr and Mrs G.M. Horner and Geraldine, daughter of the late Mr L.F. Halliwell and Mrs A Parkinson."Geri, 42, and Christian, 41, both have children from their previous relationships.

with Sacha Gervasi. Christian, meanwhile, recently split from his partner of 14 years Beverley Allen, with whom he has a one-year-old daughter Olivia.