## How to place subtitle in paper

If I have the title as "This is my Title", then I'd code:

\title{This is my Title}

and in \documentclass{amsart}, that is all in capital letters.

How can I then specify "This is my subtitle" and have it appear below the title but in lower case with capital first letters or whatever is standard for a subtitle? I see there is no \subtitle command and when I try to specify two lines in the title command, all are capitalized.

Thanks guys,