The Palace midfielder struck from 15 yards shortly after the hour-mark, seemingly handing his side a well-earned point before Wilfried Zaha secured two more with a dying-seconds winner.
Browsing: Crystal Palace
Gallagher has enjoyed a stellar campaign at Selhurst Park during the 2021-22 season, but the 22-year-old is set to return to parent club Chelsea at the end of the campaign.
After a drab first half, goals from Ruben Loftus-Cheek and Mason Mount sent the Blues through to a third successive final, where they will take on Liverpool in a repeat of February’s EFL Cup final.
The two London-based clubs are vying for the chance to meet Liverpool in the final match of the showpiece event.
Brendan Rodgers’s side come into the game on the back of a 0-0 draw with PSV Eindhoven in the first leg of their Europa Conference League quarterfinal, while the Eagles thrashed Arsenal 3-0 last time out.
The Eagles star has been a consistent part of Patrick Vieira’s plans this season, playing 22 of Crystal Palace’s 29 Premier League games so far, scoring twice in the process.
The Citizens booked their place in the final four after beating Southampton 4-1 at St Mary’s on Sunday afternoon, with Raheem Sterling, Kevin De Bruyne, Phil Foden and Riyad Mahrez all on the scoresheet.
At a time when the Toffees are scrapping for survival in the top flight, Palace have enjoyed a solid campaign, currently sitting in 11th position after a four-match unbeaten streak.
The midfielder has been a revelation since his summer arrival from Reading.
London-born forward Olise, 20, has represented France at youth level but could also play for England, Nigeria or Algeria.
The visitors, meanwhile, could sneak into the top half of the table on goal difference if they were to claim maximum points at Molineux.
The Eagles ran out 4-1 winners at Watford on Wednesday evening, while Sean Dyche’s side took another step towards survival by beating Tottenham Hotspur 1-0.
The hard-fought win for the Blues was coming after nearly a month’s absence in the English Premier League.
The match will be Chelsea’s first league outing in almost a month, but they take on a Palace side still winless in the top flight so far this calendar year.
The newly-rich Toon offered the Eagles £5 million in the January window to take their playmaker on loan for the rest of the season with a view to a £35 million permanent switch at the end of the season.
The Bees went down 2-0 to Manchester City in midweek, while Patrick Vieira’s side were held to a 1-1 draw by a resurgent Norwich City.
The Athletic reports the Netherlands international has agreed a move to Goodison Park after snubbing a rival offer from Crystal Palace.
The 74-year-old left Crystal Palace at the end of last season and has been contemplating whether to return to the game.
Meanwhile, the hosts are returning to action nine days after playing out an enthralling 1-1 draw with Brighton & Hove Albion in the M23 derby.
The Hammers will enter the contest off the back of a 4-1 win at Watford, while Palace recorded a 3-0 victory over basement side Norwich City last time out.