A Pennsylvania couple plans to have their dying toddler serve as the groom's best man when they wed this weekend.

Two-year-old Logan, who spends most days home wrapped in a blanket clutching his stuffed bunny, is the son of Sean Stevenson and Christine Swidorsky, of Jeannette, Pa., which is just outside Pittsburgh.

The couple had planned to wed next year, but decided to move the ceremony up to Saturday so the boy, who has leukemia and other complications, could participate. The bride-to-be plans on carrying the boy up the aisle at their backyard ceremony.

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"It hurts so bad because Logan is such a loving child ... when I cry he wipes my tears away," Swidorsky told The Pittsburgh Tribune-Review. "Logan is a mama's boy."

The boy has already lost one kidney and has a mass on his remaining kidney. He has Fanconi anemia, a rare disease that often results in cancer. Doctors last week gave the boy two to three weeks to live.

The paper reported that he just recently went on a Make-A-Wish trip down to Disney World, but it was cut short when he came down with septic shock and hydration shock and rushed back to his hometown.

"For such a small person, he has touched thousands of people," Kellie Young, the boy's aunt told The Pittsburgh Tribune-Review.

Swidorsky says, "We want Logan in our family pictures, and we want him to see his mother and dad get married."

She told the paper, "It'll be the hardest thing I'll ever do is bury my son. You know it's coming, and you can't do anything about it."

The Associated Press contributed to this report