How does one fetch the arguments of \title and \author? [duplicate]

Question

When using the simple \maketitle command, one can use \title, \author, \date etc to define the corresponding contents. Now if one desires to for example make a custom title page, how can this information then be retrieved?

MWE:

\documentclass{report}
\title{My report}
\author{Me \and Myself}
\date{\today}
\begin{document}
\begin{titlepage}
%\thetitle?
%\theauthor?
%\thedate?
\end{titlepage}
Hello world!
\end{document}