If you want to send him a letter we suggest you write to his agency:

Ewan McGregor
c/o PFD
Drury House
34-43 Russell Street
London WC2B 5HA
England

Here's what fans said that tried this address:

Annie: "I have tried the fan mail address before with Star Wars trading cads included and he signed them and sent them back. It took about a month or so."

Tammy: "I sent a fan letter to the address you list and I received a pic with an autograph on it today. It took about 30-32 days for something to come back. Cute pic."