Cobie Smulders was 35 in Avengers: Infinity War when she played the character 'Maria Hill (uncredited)'.
That was over 6 years ago in 2018.
Today she is 42, and has starred in 28 movies in total, 6 of those since Avengers: Infinity War was released.
In Avengers: Infinity War, I think Cobie Smulders looks: