Have you noticed that Ryan Seacrest looks taller lately?

Life & Style has learned that the Million Second Quiz show host, 38, is going to great lengths to boost his height.

"He's grown his hair out and has been quaffing it higher," an insider tells the new issue of Life & Style, on stands now. "He was just so sick of looking like a little boy in front of the A-listers he interviewed on the red carpet."

And it was Ryan's ex girlfriend Julianne Hough who was the one to come up with the height boosting trick he's now sporting!

"Julianne always wondered why he cut it so short, so she said to change it," the insider adds.

It appears to be working, too!

"Ryan's driver's license says he's 5-foot-9," says the insider. "But with his hair and the shoes, he really is now!"