"Undeniable" is a song by Norwegian record producer and DJ Kygo, featuring a guest appearance from American rock band X Ambassadors.

[2] Kygo wrote the song with Ethan Snoreck, Jacob Kasher, Nick Long, Patrick Martin and X Ambassadors' lead vocalist Sam Harris, and produced it with Petey Martin.

In a press release, X Ambassadors stated:[4] I've always had an affinity for big-ass love songs but don't often end up writing them.

I honestly couldn’t be more excited to sing it at all my friend’s weddings.Drew Barkin of EDMtunes described the song as "a heartfelt track that will get you thinking about loved ones".

[5] The song is written in the key of F♯ major, with a tempo of 108 beats per minute.