How to surprise fiance!

We decided to throw caution to the wind the month of our wedding and low and behold I didn't get my period and tested this morning and:

A faint line!

He's been swearing I'm pregnant for the past two weeks and I've been telling him it's unlikely...and did the test while he was on his bachelor trip! ( He knew I was going to test while he was away and tell him when he got back)

What are some ideas for surprising him! Anyone's else's partner know they were pregnant before them?