From 2005 till 2009 he played the role of singer Martin Morero in the comedy-drama series Gooische Vrouwen.
Muller also hosted the spin-off talk show Villa Morero with Beppie Melissen and they both interviewed, in character, two guests in each episode.
Other series in which Muller played a role are Vechtershart, Meisje van plezier, Flikken Rotterdam and Hollands Hoop.
[1][3] The series is directed by Jean van de Velde and Barbara Jurgens.
[11] Muller also provided the voice for characters in the Dutch version of several films, including Incredibles 2.