One of these individuals paused to take a selfie with Real Madrid star Vinicius Junior, capturing a moment of chaos on what should have been a night of football celebration.
Wembley Stadium security staff quickly removed two of the intruders, but the disruptions continued as another person ran onto the field, visibly irritating some players.
It ultimately took four security staff to apprehend the final invader, marking a shaky start to the highly anticipated match.
Real Madrid, aiming to secure a record-extending 15th European Cup, faced Borussia Dortmund, who are seeking their second Champions League title.
The pre-match chaos, however, has cast a shadow over the event, raising questions about the effectiveness of the security measures in place.
As the match continues, fans and officials alike hope that the focus can return to the football on the pitch rather than the security breaches that marred the beginning of the evening.