"I am very happy and looking forward to my Premier League career," he told skysports.com.
"It is a dream come true and I want to show my value to Sunderland.
"There are good players there and we can finish strongly in the league."
Steve Bruce on Sess:
“We've been tracking Sessegnon for a long time because of his versatility,” said Bruce, who expects to have Lee Cattermole and John Mensah available for next Tuesday's home game with Chelsea.
“He can play on the left, the right, up front, or off a lone striker. He's played in all of those positions when we've been watching him. That's the beauty of him.
“Sessegnon is somebody who will light up the stadium. He's one of those players with a low centre of gravity, who is stockily built, but who is very, very quick. I was told by his agent that he's been training in the last couple of weeks with an Olympic sprinter who thinks that, over 60 metres, he could be in the top ten fastest runners in France.
“He's lightning quick, and he's exactly what we haven't really had before. He's been on our radar for a while because we know he's been uncomfortable in Paris for whatever reason. I hope he can come and do a good job for us.”
Though apparently:
“We're now in discussions with Sulley Muntari,” confirmed the Black Cats boss. “There's an agreement with (Inter) Milan, and I believe the deal is close. We're in discussions with Paris St Germain about Stephane Sessegnon, but we haven't got permission to speak to the player directly yet.
“We have permission to speak to Sulley, so I guess you could say that's the furthest down the line. In the next 24 hours, though, I would hope that we could add both players to the squad.”