Best man speech jokes for a Halloween wedding?

So my mom is getting married tomorrow! The theme is Halloween and all the guests are dressing up. How cool is that!? I am looking to add some jokes to my speech. Reddit always comes through for me, I have faith!

I want to start my speech thanking everyone for attending and make some joke referring to how everyone looks or about a Halloween wedding in general. Ideas?
I also want to end my speech by welcoming my mother's new husband to the family and making another joke about him entering our family or any joke to close my speech.

If it helps the bride and the groom are not necessarily dressing up, just no the typical white dress and what not. I am dressing up as a pirate though. So I guess pirate jokes are welcome. Thanks guys!

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