I don’t think Reynolds was any good in Mary, Mary but it wasn’t from excessive mugging. She seemed to be singing all her lines. Mary’s defining characteristic is her need to respond to anything with a quip. This requires an expert in dry/sly delivery. This is not Reynold’s forte. Also, the character doesn’t believe ( has never been told) she is pretty. Debbie is nothing if not as pert and pretty as 1960s actresses get!