Facebook has filled one of its most important executive roles: Nick Clegg, the former deputy prime minister in the U.K. under David Cameron, is joining Facebook to lead all communications and global policy.

It’s an important job. Elliot Schrage, who has held that role inside Facebook for the past decade, was incredibly influential. He was a top adviser to Facebook’s top decision makers, CEO Mark Zuckerberg and COO Sheryl Sandberg, and help shaped Facebook’s response to a number of important crises, including Cambridge Analytica and issues of Russian election meddling.

Clegg will be tasked with handling those kinds of challenges moving forward. He’s a rare outside hire for Facebook, which tends to fill its most important vacancies from within. Clegg’s experience in British and European politics will be key given the European Union seems much more interested and capable of regulating Facebook than U.S. politicians.

Bringing in a former British politician is also a sign that Facebook sees potential European regulation as a major concern moving forward.

“Facebook, WhatsApp, Messenger, Oculus and Instagram are at the heart of so many people’s everyday lives — but also at the heart of some of the most complex and difficult questions we face as a society,” Clegg wrong on Facebook Friday morning. “The privacy of the individual; the integrity of our democratic process; the tensions between local cultures and the global internet; the balance between free speech and prohibited content.

“I believe that Facebook must continue to play a role in finding answers to those questions,” he continued.

Clegg starts at Facebook on Monday, according to a company spokesperson. Facebook’s head of communications, Caryn Marooney, and its head of public policy, Joel Kaplan, will report to Clegg. Clegg, meanwhile, will report to Sandberg, as did Schrage.

Here’s Sandberg’s Facebook post announcing Clegg’s hire