Adopt the character of Lydia Bennet from Pride & Prejudice and write a journal entry in Lydia's diary in which she describes her wedding day in the first person. Be sure to mention that Mr. Darcy was there and that he paid Mr. Wickham.
I have married my dear Wickham, and what an enchanting ceremony it was. Though I knew my running away with him would cause a scandal, I also knew it would all work in our favor because our love is strong enough to endure all things. 

My gown was perhaps not as elaborate as I would wish, but it happened too quickly for me to be able to order precisely what I wanted. I had white lace gloves that rose just to my wrist with the most delicate chiffon veil. My dress flowed from the bodice with a delicate white lace that accentuated my immaculate height. I felt divine, like an angel, as I walked down the aisle toward my Mr. Wickham. 

Mr. Darcy was there, for he discovered us in our attempt to run away. Imagine it! Wickham was very displeased at our being disrupted and insisted our plans be carried out, and Mr. Darcy conceded and paid for everything, including Mr. Wickham's commission. While I do still find Mr. Darcy to be a boorish and uninteresting man, I must say I was pleasantly surprised at his support. Though, after all Mr. Darcy put Wickham through, it was the least the man could have done.

We are now headed back home so that I might brag to my sisters about my ring and revel in my new status as a wife. Mother will be beside herself with joy, and of course, I cannot wait to reveal every detail to Kitty. Mary will be a bore about it as usual, but perhaps Elizabeth would like to hear of Mr. Darcy.