Subject: Invitation to [Elder Brother/Sister]'s Wedding

Dear [Friend's Name],

I hope this email finds you well. I am writing to extend a warm invitation to you to attend the wedding ceremony of my elder [brother/sister].

The wedding is going to be a joyous occasion, and [Elder Brother/Sister] and their partner are very excited to celebrate their special day with family and friends. It would mean so much to me if you could join us for this celebration.

The details of the wedding are as follows:

Date: [Insert Date]
Time: [Insert Time]
Location: [Insert Venue and Address]

I understand that you may have other commitments, but I hope that you will be able to make it to this important event in our family's life. I would be honored to have you as my guest, and I am sure that [Elder Brother/Sister] would be thrilled to see you as well.

Please let me know if you can attend the wedding, and if you need any further information or assistance with arrangements. I look forward to hearing back from you soon.

Best regards,

[Your Name]