Help me write a letter of invitation to invite my colleague to my wedding party?

I want to invite my friend tom to my wedding party
Help me write a letter of invitation to invite my colleague to my wedding party?
jusy go on google rite wedding venues, and loads come up
Reply:letter of invitation? I would ask in person. Shake their hand then shove your right shoulder into theirs. Then pat on back.
Reply:arent these what invitations are for?