Can an actor be nominated and win a tony award 2 years in row?

No, an actor cannot win a Tony Award two years in a row in the same category. The Tony Awards are presented annually to recognize excellence in Broadway theatre, and each award is given to a different individual or production each year.

However, an actor can win a Tony Award in one category one year and then win in a different category the following year. For example, an actor might win a Tony Award for Best Actor in a Play one year and then win a Tony Award for Best Actor in a Musical the following year.