Deion Sanders is on his way to being a grandpa ... his eldest daughter, Deiondra, just revealed she's pregnant with R&B singer Jacquees' baby!
The 31-year-old called the pregnancy "a miracle" when she announced the news on Friday morning ... explaining that doctors had told her for years it would be difficult to have a baby due to a myriad of health issues she's undergone throughout her life.
"I never thought I'd be here but here we are," Deiondra wrote on her Instagram page. "I'm having this baby to give hope to all the other women that may be in my situation.