The 24-year-old completed his £35million move to the Nou Camp from Arsenal today after completing his medical.
Fabregas made more than 300 appearances for the Gunners but the only trophy he won while in north London was the FA Cup in 2005.
The Spain international signed a five-year contract with the European champions and re-joins the club he used to play for.It is understood Fabregas has a £175million buy-out clause in his new deal.
He was introduced to 30,000 Barca fans at the Nou Camp, with his new number four shirt, and immediately set his sights on making them very happy.
“I have waited a long time for this moment,” Fabregas told a news conference. ”It’s a very special day.
“I know that many of you were disappointed when I left but I am here to take up the greatest challenge of my life.
“After eight years away I hope to leave you all with many great memories.
“They have been three or four intense days and I’ve tried to keep away from it all as much as possible.
“Until I had permission from Arsenal to travel I was not going to do it. In the end it has all been worth it.
“To get the number four shirt is very special,” he added.
“I know there has been a debate about whether Thiago (Alcantara) should have it but I’m very pleased to be able to wear the number four.”
“I come here with great humility because I know I have a lot to learn and I can learn a lot from this coach and this great team.
“I’ve played with two of them (Lionel Messi and Gerard Pique) since I was 13 and many of the others since I was 18 (with Spain) so I know them very well.
“I know I can enjoy it and make a contribution. I’m going to try very hard to make this team even more competitive and strong.”
Fabregas insists he is ready to play the second leg of the Spanish Super Cup clash with Real Madrid on Wednesday if selected following last night’s 2-2 first-leg draw.
“I didn’t see the first leg last night as I was flying over,” he said. “But physically I’m fine and ready for everything.
“It’s not my decision whether to play or not. I’m going to work very hard as always and enjoy it. I will give everything to make this club better.”
Source: SKY NEWS