In 1998 he attended acting courses in Sardinia. In 2004 he became famous to the island audience thanks to his appearances in the Lapola comedy program entitled Come il calcio sui maccheroni, broadcast in prime time by the Sardinian television station Videolina.
Between 2005 and 2006 she performed in the most important theaters/amphitheatres of Sardinia with the show entitled 6 in me!, closing the tour at the Roman Amphitheatre in Cagliari. In 2006 she moved to Rome and attended acting seminars. She became a member of the Actor’s Center Rome. In 2007 she returned to the Roman Amphitheatre in Cagliari with the show entitled Non ricordo nulla!. Also in 2007 in Rome she starred in the comedy Qualcosa di rosso written and directed by Benedetta Buccellato. In 2008 she took part in the TV film Le ali broadcast on Rai 1 and was co-star of the first sitcom for cell phones and the internet Room4U Ospite Perfetto. In 2009 she took part in the TV film Al di là del lago, directed by Stefano Reali. In 2010 she co-starred in the TV series Al di là del lago directed by Raffaele Mertes. In the same year he organized and directed the charity show Centu Concas Una Berrita. The proceeds of the evening were donated to the Italian Amyotrophic Lateral Sclerosis Association of Sardinia. In 2011 he co-starred in the mini series Angeli e diamanti directed by Raffaele Mertes. In 2012 he wrote, directed and acted in the short film Buio. In 2013 he starred in the film L’arbitro, selected in the Giornate degli autori section of the Venice Film Festival. Also in 2013 he directed the short film Special Olympics and Gigi Riva for the opening of the Special Olympics summer games. In 2014 he was among the protagonists of the film Crushed Lives – Il sesso dopo i figli, directed by Alessandro Colizzi, and took part in the film La buca, by Daniele Ciprì. In 2015 the director Gianfranco Cabiddu called him for his film La stoffa dei sogni, presented at the pre-opening of the Rome International Film Festival. Also in 2015 he directed the short film Non aver paura, to raise awareness of blood donation. In 2019 Cullin starred in the film L’uomo che comprò la Luna, a film that participated in the 2018 Rome Film Festival. In 2021 he achieved national fame for his role as agent Lello Esposito in the Rai 1 series Le indagini di Lolita Lobosco (seasons 1 – 2). In 2023 he played the role of Brigadier Ciappa in the TV movie Napoli Milionaria!

photo: Gianfilippo Masserano