UFC officials announced the pairing on Wednesday.
After suffering back-to-back losses, Font returned to the win column with an impressive showing against Adrian Yanez in April, earning a first-round knockout and a Performance of the Night bonus as a reward. Overall, Font sports a 5-2 record in his last seven fights, with additional wins over ex-UFC champion Cody Garbrandt, current Bellator champion Sergio Pettis, and Ricky Simon.
As for Song, the 25-year-old fighter from China has long been considered a top prospect at 135 pounds, methodically working his way up the rankings. While he did suffer a setback in his fight against Cory Sandhagen this past September, Song quickly bounced back with a win over Simon in April that put him at 4-1 in his last five fights.
Song seeks arguably the biggest win of his career when he faces an established veteran in Font as the bantamweights join a stacked card in Boston, which is headlined by reigning 135-pound champion Aljamain Sterling putting his title on the line against Sean O’Malley.