This deal makes Tosun the most expensive football player in Turkish Super League history.
Tosun scored 41 goals in 96 appearances for Besiktas since the start of 2014-15 season.
"It feels great to be an Everton player", Tosun told evertontv.
Tosun also underlined that he is looking forward to proving himself to Everton fans and showing them just what he is made of.
He said: "This lad looks like he is strong mentally and has a good pedigree".
Gylfi Sigurdsson hopes new Everton signing Cenk Tosun makes quick impact
"I have played against him a couple of times for Iceland, so I know he is a good player".
'I bring my skills here and everybody is going to see what kind of player I am. "He is Turkey's No.1 striker and has scored goals in the Champions League and the Turkish League but he is desperate to play here in the Premier League". I'm excited to play with them and to learn from them as well, players like Wayne Rooney and the very good creative players we have here, too. They can help me score goals.
But the boss was also quick to point out that in order for the Toffees to bring players in, they would have to make cuts to the squad first.
The manager and the club really wanted me very much and that is why I am here, ' Tosun said.
Davy Klaassen was considered a high profile signing when he arrived from Europa League finalists Ajax back in June, but having not featured in a single Premier League game under Sam Allardyce the impression is that already his days on Merseyside are numbered.
Everton has been on the hunt for a good forward after failing to replace Romelu Lukaku who was transferred to Manchester United. While three of Everton's other forwards are yet to hit the target.
Thirty-two people are missing after an oil tanker and a cargo ship collided off China's east coast on Saturday evening. State media reports that China dispatched several vessels to search for and rescue crew members as the vessel burned.
These present customers with the usual unlimited calling, SMSes, high-speed data up to a certain limit, and access to Jio apps. If discounts aren't what you are after, and you'd rather benefit from having extra data, Reliance Jio has you covered.
Prices at the pump in the state of Georgia sit at around $2.36 a gallon, more than 10 cents higher than this time a year ago . He does see a short-lived drop in prices in late January, but expects prices to rise again after Valentine's Day.
The Green Bay Packers will continue interviews with top internal candidates to replace general manager Ted Thompson on Friday. He spent a year as a scouting assistant with the Kansas City Chiefs, then returned to the Packers as a college scout.
The Dukes face No. 2 seed North Dakota State (13-1), FCS champs for five straight seasons from 2011-15. With the game in the final minutes, JMU ran a fake punt with Harry O'Kelly to continue the drive.
With Falcon heavy, SpaceX will also attempt to simultaneously land and recover all three of its first-stage rocket cores. The mission, only known as Zuma, was set for Thursday, pushed back to Friday and then again into the weekend.
He was down on the court for several minutes, but was able to walk to the locker room under his own power. Griffin, a 5-time All-Star, has already missed 14 games this season with a sprained knee ligament.
GeForce Experience Gets New Freestyle, Ansel Features
It also adds support for NVIDIA Freestyle which lets you apply post-processing filters to your games while you play. Ansel has refreshed Photo Mode controls, eight new filters and the ability to combine multiple filters.
Brad Pitt outbid on GoT screening
Later during the auction, DiCaprio bid $80,000 on a painting by artist Josh Smith but was outbid by Clarke for $90,000. Of course, the event was all for charity, with proceeds going towards the J/P HRO & Disaster Relief Organizations.
Bannon praises Trump's son in statement
Tapper responded that that "wasn't true", and he had a lot of questions about immigration, and accused Miller of "filibustering". Miller replied that Bannon's role "has been greatly exaggerated, whereas the president hasn't gotten the due that he deserves".
Trump postpones his 'fake news' awards
Maybe-maybe-there was a chance that we would, for at least a couple minutes, stop paying attention to Donald Trump . But President Trump isn't one to be overshadowed, so he's getting in on the awards show action himself.
Astronaut John Young, who walked on the moon twice, dies
Crippen said in 2004. "Today, NASA and the world have lost a pioneer", Robert Lightfoot, NASA administrator, said in a statement . On Apollo 10 , in May 1969, Nasa performed what it called "a full dress rehearsal" for landing men on the moon two months later.
McDonough bids farewell to Gruden during broadcast
Other teams have also done it, with one of the most recent notable coaching hires being Joe Gibbs in Washington. Hours after the game, the Oakland Raiders made it official by sending out tweet and press release.