Update: We have some details now regarding the special gift, as I've just received the email.
Basically it's a print which Sony says will be "unique to you and show everything you’ve achieved as a PlayStation Plus member."
"PlayStation Plus is turning five. To thank you for being a member from the very start we’d like to send you a personalised print, but we’ll need your address by 13 July 2015.
"We’re proud to have so many dedicated players who have been with us since the beginning.
"Thanks for being part of five fantastic years," says Sony.
Original: Sony is celebrating PlayStation Plus' five-year anniversary by offering a "limited edition gift" to Players who have been subscribed to the service since the beginning.
We still don't know the details of the reward, but will soon find out when the email arrives.
"Today marks the 5th anniversary of PlayStation Plus and we’d like to thank all of you for being part of five fantastic years," said Sony.
"To celebrate those of you that have been with us from the very beginning, a limited edition gift will be arriving in the mail for those of you that have been part of the journey since the very start. Think you may be one of them? Then keep a close eye on your emails as we’ll be getting in touch today."
PlayStation Plus launched in Europe on June 29, 2010. Have you been a subscriber since then?