- Who
- Iker Casillas
- What
- 177 total number
- Where
- Not Applicable ()
- When
The most UEFA Champions League appearances by a player is 177, achieved by Iker Casillas (Spain) between 15 September 1999 and 17 April 2019.
As of the end of the 2018/19 season, Casillas had made 150 UEFA Champions League appearances for Real Madrid (1999–2015) and 27 for Porto (2015–2019). On 11 December 2018, he became the only the second player (after Cristiano Ronaldo) to record 100 victories in the competition.