Guilfoyle was pictured this month at gay-friendly Nammos beach club on Mykonos enjoying a glass of Champagne with the US Ambassador to Belgium, Bill White, and his husband.
A plethora of famous faces turned out for the occasion as Spain looked to seal their spot in the semifinals of the World Cup for the first time since 2010 when they won the tournament in South Africa.
Noel Gallagher looked tense as he joined Penelope Cruz and her husband Javier Bardem to watch the Spain vs Belgium World Cup quarter-final match on Friday.