How old was Marcus Seibert in…

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Marcus Seibert will be ? in The Forest Within as 'Writer'.

Movie Released: Thu, Apr 10 2025

Marcus Seibert was ? in A Handful of Water as 'Writer'.

Movie Released: Sat, Oct 24 2020

Marcus Seibert was ? in The Lie as 'Original Story'.

Movie Released: Thu, Sep 13 2018

Marcus Seibert was ? in Tigersprung as 'Writer, Producer'.

Movie Released: Wed, May 30 2018

Marcus Seibert was ? in We Monsters as 'Writer'.

Movie Released: Thu, Jan 22 2015

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Ages in TV shows are based off the first air date and may not be accurate. View individual episode details for accurate ages

Marcus Seibert was ? in Lindenstraße as 'Writer'.

TV Show Released: First Air Date
Sun, Dec 08 1985