Gustin joined the show last season as antagonistic Dalton Academy student Sebastian Smythe, who developed a crush on Blaine (Darren Criss) and conspired against the New Directions.
© Fox
© Fox
TVLine confirms that Gustin will return for multiple episodes beginning in November.
Sebastian was referenced in the most recent episode aired, 'The Break Up', during a confrontation between Blaine and boyfriend Kurt (Chris Colfer).
Gustin stated early this year that he was unsure about his future on the show.
It was recently suggested by co-creator Ryan Murphy that Bette Midler will appear on a future episode this season.
Watch a promo for the next episode of Glee, 'The Role You Were Born to Play', below:
