The 22-year old Guinea-Bissau-born Portuguese striker has signed a four-year deal with the Hoops for a fee of £1.8million and was delighted to have finally clinched his move to Glasgow.
"I'm proud to sign for Celtic and want to do everything I can to take this opportunity, work hard and grow as a player.
"I fell in love with the club three years ago and I watched every game on TV.
"When I saw the Barcelona game last year [in the Champions League] it was crazy and I loved the crowd.
"After watching that game, there are no words I can say to describe what it will mean for me to play for Celtic."