Ronaldo has been out of action since June after undergoing surgery on an ankle problem that plagued him during the latter half of last season.
The Portuguese winger was initially scheduled for an October comeback, but recent rumours suggested he may be forced to sit out until mid-November after suffering a setback.
However, such speculation appears to be well off the mark, as Ferguson insisted recently that Ronaldo's recovery was progressing excellently.
And the United boss has dropped a bombshell by confessing that the 24-year-old could even make the squad for today's derby at Anfield.
"Ronaldo is training now, he's with the first team. He's come on leaps and bounds and I may take him with us tomorrow, who knows? But he's more likely to be involved next week," Ferguson told United's official website.
"I think we mentioned a couple of weeks ago he was making rapid progress in terms of overcoming the injury problem he had and the training he's been doing with the physios and Tony Strudwick the fitness coach.
"He's been making great strides in the direction towards first-team football."