The 32-year-old Channel 4 favourite pitched in during the England vs Croatia semi-final to ask that Gareth Southgate bring on her favourite player in a bid to help see them through to the final.
Rachel Riley admitted she was biased in favour of the 20-year-old forward because of her life-long status as a Manchester United fan.
“I know I’m biased but… Rashford on for the winner?!” she joked, adding: “#EnglandCroatia.”
Her prediction came true when he came on as a substitute for Raheem Sterling.
Sadly, neither Rashford nor any of the rest of the England squad managed to find the back of the net again after Kieran Trippier’s incredible early goal.
The match ended up in extra time, the latter part of which saw Croatia pull ahead.
When the whistle eventually blew, it was the eastern European side who successfully earned a place in Sunday night’s final against France.
The Three Lions, meanwhile, will play Belgium on Saturday for third place in the tournament.
Rachel’s 573,000 Twitter followers took to the comments to reply to her tweet about Rashford after he was brought on.
“You said it Rachel,” one said, while a second added: “It’s all set up for him now,” along with fingers crossed emojis.
“Sorry, he was poor,” another disagreed. “Rabbit and headlights spring to mind!”
One social media user even complained: “Rashford was a wasted substitution.”
Some of Rachel’s fans were more preoccupied with an earlier promise in which the blonde beauty appeared to have vowed to present Countdown in the buff if England won the World Cup.
Last month, she retweeted an image which showed her posing next to a placard which read: “If England win World Cup, I’ll do Countdown naked.”
Dashing some of her fanbase’s hopes, however, she clarified: “This is doing the rounds. Of course it’s photoshopped.
“It was actually @Nick_Hewer who said this,” she quipped.
Following her optimistic World Cup prediction last night, some Twitter users didn’t appear to have received the message the photo was fake.
“Gutted was so looking forward to Countdown,” one cheeky comment read, while another said: “Well there be no chance of you presenting Countdown in the nude.”(sic)
“Least you kept your clothes on,” a third remarked.
England vs Belgium kicks off Saturday at 3pm on ITV and France vs Croatia kicks off Sunday at 4pm on BBC One and ITV.