It may be time to put the cork back in the champagne bottle and take off the celebratory party hats -- Robin Thicke may NOT actually be engaged after all ...

The "Blurred Lines" singer is shutting down reports he asked his 20-year-old girlfriend April Love Geary to marry him. We think that's good given her age, but the dude's still dating someone who can't take a legal drink. Classy!

Previously, Robin was married to Paula Patton for 10 years, but the pair had been together for 22. Their divorce was only finalized in March but Robin and April have been an item for at least nine months.

On Wednesday, Life & Style reported that he proposed, quoting a source who said, "Robin's moving really quick with the relationship ... he doesn't want to risk losing her."

But apparently that rumor is not so true. A rep for the singer says those claims are "100% not true," reports NY Daily News.

The report seemed very believable because the pair have been inseparable dating since they started dating in November 2014. Since then, the pair have been traveling together constantly, meeting each other's parents, spending time with Robin's son Julian and generally enjoying life.

So perhaps the story isn't true ... but that doesn't mean it won't be. Maybe he will propose on her 21st birthday?!