Rob Lowe still has PTSD from Prince William‘s hair loss.

In a new interview with The Telegraph, the 55-year-old actor was asked if he considers himself to be more or less vain than the average British man, to which he quipped, “That’s a low bar!”

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“Can we talk about William?” the “Parks and Recreation” star added by way of explanation. “I mean the future king of your country let himself lose his own hair! So when I say British men set a very low bar … Honestly, one of the great traumatic experiences of my life was watching Prince William lose his hair.”

Continued Lowe: “But he’s going to be the f—king King of England! And … and there’s a pill!”

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When it comes to his own head of luscious locks, Lowe doesn’t mess around. “The first glimmer that a single hair of mine was going to fall out, I was having stuff mainlined into my f—king veins,” he explained. “And that’s what I did for the next 30 years.”

So if you ever see the Golden Globe winner’s coif starting to thin out, you’ll know something’s gone seriously awry.

This article originally appeared in Page Six.