This dance-pop song about getting people to party was written by Steve Mac, Wayne Hector and Ed Drewett, the same trio who also penned "All Time Low
" and "Lightning
." Speaking with Artist Direct
, band member Jay McGuiness described the threesome as "our dream team." He went on to say, "When they work together, they make the greatest songs ever. They played 'Glad You Came' for us and it was a different sound for us. We had poppy rock and cool string vibes going. We liked the song, went in and did our version of the vocal, and we were surprised! We started doing it at gigs, and the fans went crazy, so we knew it had to be the next single."