Former Boston College quarterback Thomas Castellanos has officially signed with Florida State, the school announced on Friday.

Castellanos told On3's Hayes Fawcett about the transfer on Wednesday and had already celebrated the news on social media.

Head coach Mike Norvell celebrated Castellanos' transfer by calling him "one of the most dynamic players in college football."

After beginning his college career at UCF, Castellanos started for two seasons at BC. He left the Eagles in November after losing the QB1 spot to backup Grayson James.

Following struggles with pass accuracy early in the 2024 season, Castellanos' last outing for the Eagles came during a Nov. 9 win over Syracuse.

After going 2-for-7 for 14 yards with a touchdown and an interception, Castellanos was benched by BC head coach Bill O'Brien.

O'Brien then named James the starter ahead of the following weekend's contest against SMU, telling reporters at the time that Castellanos was "taking a couple days" away from the team. Castellanos announced his intent to transfer two days later.

He will reunite at Florida State with Gus Malzahn, who departed from his role as UCF's head coach in November to serve as offensive coordinator for Norvell. Malzahn previously led Castellanos during his freshman season with the Knights.

Castellanos is now set to once again return to a QB1 role with the Seminoles, who are looking for an answer under center after quarterback struggles contributed to the team's 2-10 finish to the 2024 season.

DJ Uiagalelei, who transferred from Oregon State as a prospective starter for the Seminoles this season, was benched after five games in favor of redshirt freshman Brock Glenn and freshman Luke Kromenhoek.

Castellanos, who had established himself as a dual-threat quarterback following his 1,113 rushing-yard sophomore campaign for Boston College, will hope he turns out to be a better match for an offense Malzahn has said he hopes will "run the football downhill" more in 2025.