The 28-year-old Dutch international signed a three-year deal with the Premiership side.
Demba Ba scored a hat-trick as Newcastle United continued their impressive start to the season with a deserved 3-1 win at Stoke City in the Premier League on Monday.
IMAGES from the English Premier League matches played on Tuesday.
Newcastle United's charge towards Champions League qualification gathered pace on Saturday with a 3-0 home win over Stoke City which moved them into fourth spot in the Premier League as rivals Arsenal and Chelsea could only draw 0-0.
IMAGES from the English Premier League matches played on Saturday.
A summary of Thursday's action in the Premier League.
Newcastle United were left deep in relegation trouble after being held to a goalless draw at home to Portsmouth in a tense Premier League match on Monday. With four matches left to play, Newcastle remain in the drop zone with 31 points, although the draw was enough to move them ahead of Middlesbrough on goal difference and up to 18th place.
A round-up of Saturday's action in the English Premier League.
IMAGES from the English Premier League matches played on Wednesday
Images from the English Premier League matches played on Saturday.
Reigning champions Manchester City took the lead after 24 seconds but suffered a shock 2-1 defeat at Newcastle United.
City having already bagged the title and Newcastle safe, there was nothing riding on the fixture but it served up some rich entertainment
Manchester City thrashed West Ham United 4-1 in the Premier League on Saturday to claim their first back-to-back wins since October.
Theo Walcott and Nicklas Bendtner made goalscoring returns from injury on Wednesday as Arsenal thrashed Newcastle United 4-0 away to reach the last eight of the League Cup.
Lee Bowyer will serve a three-match ban after his claim for wrongful dismissal against Liverpool was rejected
Newcastle United, playing with 10 men for 75 minutes, earned a spirited 2-2 draw with Manchester City at St James' Park.
Photos of the damaged pitch showed an area of exposed sand that looked like a golf bunker near one of the corner flags.
Fans return to English grounds, but told not to celebrate goals too much.
Guardiola optimistic of De Bruyne's quick return
Arsenal closed the gap on leaders Liverpool with a 2-1 Premier League victory at Nottingham Forest
Bleeding money since taking over Newcastle United, sportswear tycoon Mike Ashley is putting it on sale with a 100 million tag after the club was relegated from the Premier League.
A summary of Saturday's action in the Premier League.
The Liverpool skipper was booed by sections of the home crowd in a backlash against England's failure to qualify for Euro 2008 but he responded with a thunderous opening goal against Newcastle United and a big hand in the other two.
England forward Alan Smith joined Newcastle United from Premier League champions Manchester United on Friday in a five-year deal.
Real Madrid will play local rivals Atletico Madrid while Bayern Munich were drawn against Bundesliga title challengers Bayer Leverkusen on Friday.
Liverpool strolled to a 2-0 victory over Brentford, while Newcastle drew 1-1 at Bournemouth.
Kevin Keegan resigned as manager of Newcastle United on Thursday, less than eight months after taking charge of the Premier League club for the second time. In a statement issued through the League Managers Association, Keegan said he had been left with "no choice" other than to leave because of the way the club was being run.
Newcastle United midfielder Joey Barton was released from jail on Monday after serving 2-1/2 months of a six-month sentence for attacking a teenager last year.
The former England captain told Newcastle United that unless he is a regular in the team in his last premier league season he could look for another club.
Premier League clubs have been in discussions to finish the season, which has nine rounds remaining, and the possibility of a restart next month was given a boost when the government said elite sport could return after June 1.
Newcastle United striker Papis Cisse has split from his beauty queen girlfriend Rachelle Graham, and is looking to concentrate on football after a turbulent few months.
Newcastle United's euphoria after their win over Middlesbrough on Monday turned to despair on Saturday when a 1-0 loss at home to Fulham left their Premier League status hanging by a thread.
An intoxicating day of Premier League action on Saturday ended with leaders Manchester United beaten for the first time this season, title rivals Arsenal blowing a 4-0 lead and a record 41 goals across eight fixtures.
The incident was one of many involving match officials being confronted in the top flight at the weekend, with the FA also charging Liverpool manager Juergen Klopp with improper conduct for his outburst at an assistant referee.
Newcastle United skipper Michael Owen is ready to return for next week's match at Hull City which he described as "a cup final" as his side battle to avoid relegation from the Premier League.
Arsenal defeated London rivals Chelsea 1-0 for their first win in four Premier League games on Sunday as a headed goal by stand-in striker Mikel Merino boosted their faint hopes of catching up with runaway leaders Liverpool.
Newcastle United produced an astonishing fightback to draw 4-4 at home to Arsenal on Saturday after trailing 4-0 with just 26 minutes gone in the Premier League on Saturday.
A remarkable lobbed goal by Henrik Pedersen after only four minutes has given Bolton Wanderers a 1-0 home win over Newcastle United in the premier league.
Chelsea surrendered another three points in their quest for a top-four Premier League finish as Newcastle United's new signing Moussa Sissoko struck in the last minute to grab a 3-2 win that left Rafa Benitez's side reeling.
