A tight affair saw Palace narrowly enjoy the better second-half performance, but Brighton held on to tee-up a nervewracking second meeting three days later.
The Eagles lost Glenn Murray at the close of his record-breaking Championship season that evening at Selhurst Park, but the frontman's injury didn't deter them.
This crucial clash was the third-last step on Palace's return to the Premier League and will last as a significant evening in the club's history.
To relive the full game before watching the second leg and final on Saturday and Sunday respectively, head over to Palace TV! If you're using the official Palace app, just click 'Palace TV'.