Fan Casting T.J. Miller as Robbie Valentino in Return to Gravity Falls (Live Action Movie)

T.J. Miller is known for his roles in Deadpool, Deadpool 2, and Big Hero 6. He has been suggested by fans for 741 roles on myCast, including Washer in Zodiac Academy. Similar actors include Bill Hader, Josh Gad, and Jack Black. T.J. Miller was suggested to play Robbie Valentino in Return to Gravity Falls (Live Action Movie) by tomzillawash3r3. Other actors sugggested to play this role include Devon Bostick. Return to Gravity Falls (Live Action Movie) has 23 roles, including Dipper Pines, Mabel Pines, and Wendy Corduroy.