Humorous Sentimental Wedding Speech Composition

I'm in need of a heartwarming yet lightly humorous speech to officiate a wedding. This should ideally hit the 15-20 minute mark. I'll provide a recorded conversation with the couple for some context. Demonstrate your ability to weave stories naturally into a heartfelt, laughter-inducing narrative. Experience in comedic and sentimental writing is a must. Remember to:

- Use a tone that combines light humor and sentimentality
- Include elements derived from the provided recording with the couple
- Ensure the speech lasts between 15 and 20 minutes.