The two-time Ajax Player of the Season has completed his move to Camp Nou, where he will replace Manchester City-bound Claudio Bravo.
Barcelona has announced the signing of Jasper Cillessen from Ajax on a five-year contract.
The goalkeeper arrives at Camp Nou for a fee of 13 million euros ($14.68M), with a further €2M for performance-related add-ons, and will replace Claudio Bravo, who is set to be announced as Manchester City's last signing.
Cillessen's buyout clause has been set at €60 million and he will be presented to the Barcelona fans on Friday.
"Dreams come true," he said on Twitter, complete with a picture of him in a Barcelona shirt in front of the club's badge ahead of the confirmation.