Tiffany Trump Ready for Wedding at Mar-a-Lago, Donald Dresses in Tux

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Tiffany Trump seems ready to say "I do" in her dad's backyard this weekend -- and the ex-Prez was on hand to see his daughter through it to the end ... looking spiffy, no less.

Donald's second youngest was in her bridal gown Saturday, with all her bridesmaids standing at the altar as the nuptials looked to be getting underway at Mar-a-Lago ... apparently, they went with a blue motif, as you can see in Ivanka's dress.

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