Tilli Antonelli (Attilio Antonelli; born Russi, 27 September 1955) is an Italian entrepreneur and yacht manufacturer.In 1981 he founded Cantiere Navale dell'Adriatico, located in the nautical business cluster of Marche, region of Italy.
In 1985 he founded both the shipyard and the brand Pershing who become part of Ferretti Group in 1998.
He was president of Itama from 2004 until 2009.
In 2010 he founded WIDER, a nautical company born as a spin-off yacht manufacturer, after he left his former position.
In May 2014 he was nominated member of UCINA's managing board.