How to insert a pdf page as a front cover?

Question

I have to insert a pdf page as a front cover for my thesis. How could I do it? This a mwe:

\documentclass[fontsize=12pt,%
               twoside=semi,%
               headings=small,%
               chapterprefix=true,%
               listof=flat]%
{scrbook}
\usepackage[marginparsep=8pt,left=2.5cm,right=2.5cm,top=2cm,bottom=2cm]{geometry}
\begin{document}
\end{document}

Answer 1

The question was answered in the comments and, since no one wrote an answer, I made this answer a community wiki answer. The original answer was by the OP @domi:

Using pdfpages, you can do

\documentclass{article}
\usepackage{pdfpages}
\begin{document}
  \includepdf[pages=1]{pt.pdf}
\end{document}