The 24-year old winger has signed a four-year deal with the Lisbon club after four years at Old Trafford where he managed just seven appearances.
Bebe joined United in a shock £7.4million from Vitoria de Guimaraes in the summer of 2010 despite then-manager Sir Alex Ferguson having never seen him play.
In 2011 he joined Besiktas on loan and has since spent time with Rio Ave and Pacos de Ferreira – the latter stint yielding 14 goals from 39 outings.
Bem-vindo Bebé | Welcome Bebé | Bienvenido Bebé pic.twitter.com/alk3zYYAeZ
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