Ad Infinitum is the third EP by American rock band Of Mice & Men.

[8][9] On September 29, 2021, four months after the band's second EP release, they unveiled a new single "Mosaic".

On October 19, the band released the single "Fighting Gravity" while also announced the EP itself, the EP cover, the track list, and release date.

[12][13] The group also surprise announced their upcoming seventh studio album, Echo, which will be released along with the EP and will compile all three EPs.

[14][15] On November 24, one week before the EP release, the band unveiled the third single "Echo".