Margaret Welby "adores" the 67-year-old Gunners Boss to such an extent she even calls herself his 'girlfriend'.
At 36 years her junior, the famed Gunners boss made sure her already special occasion was especially memorable by sending her a signed photograph and birthday wishes.
Born in 1914, devoted Arsenal fan Margaret even has a photograph of Wenger on her bedroom wall - right alongside portraits of her beloved family members.
So you can imagine her join at getting the personal letter signed by the Frenchman himself.
Wenger wrote: "On behalf of all the player and staff, may I take this opportunity to send our congratulations and good wishes on the occasion of your 103rd birthday!
We understand that you are a loyal Arsenal supporter for which we are very grateful.
"We do hope that you will enjoy this special day and wish you all the very best for the future from everyone here at Arsenal Football Club."