Robert Downey Jr. revealed the Avengers: Doomsday cast "nerded out" when original X-Men stars Kelsey Grammer and Rebecca Romijn returned as Beast and Mystique. He said their presence brought fresh excitement and energy to the set, making the crossover feel special as Marvel unites legacy X-Men characters with the MCU in its upcoming blockbuster.
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X-Men Return Thrilled Avengers: Doomsday Cast: Robert Downey Jr
