Cambridge Analytica has denied doing paid work on the campaign for Brexit and says its work on the Trump campaign did not use data at the centre of a Facebook scandal, where the details of around 87 million users were allegedly improperly obtained.
"The founder and CEO of Facebook has accepted our invitation and will be in Brussels as soon as possible, hopefully already next week [sic]", Antonio Tajani, president of the European Parliament said in a statement.
Collins added: "Following reports that he will be giving evidence to the European Parliament in May, we would like Mr Zuckerberg to come to London during his European trip". Shares in the company even rose after his appearance.
He might get tougher questions in Brussels, where an assertive new European data protection law comes into effect on May 25.
The conference of presidents, a governing body comprising the elected heads of the European Parliament's political groupings, has also chose to organise a hearing with Facebook, providing members of the LIBE committee to carry out an in-depth analysis of aspects related to personal data protection, with emphasis placed on its role in elections.
Zuckerberg will meet leaders behind closed doors, something that's being slammed by Liberal leader Guy Verhofstadt on Twitter.
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The EU Justice Commissioner also wants a public hearing. "It's a step in the right direction towards restoring confidence".
Mr Tajani had invited Mr Zuckerberg, saying that the 2.7 million European Union citizens affected by the data sharing scandal deserved a full explanation.
Mr Zuckerberg is also confirmed to visit French President Emmanuel Macron in Paris on May 23, along with other tech leaders, according to the French presidency.
At the back of MEPs' minds will be the scandal of Cambridge Analytica, the data company that harvested Facebook data and used it - apparently without users' knowledge - to manage electoral campaigns.
"We hope that he will respond positively to our request, but if not the Committee will resolve to issue a formal summons for him to appear when he is next in the United Kingdom". Ime Archibong, Vice president of product partnership at Facebook said, "We suspended the myPersonality app nearly a month ago because we believe that it may have violated Facebook's policies, We are now investigating the app, and if myPersonality refuses to cooperate or fails our audit, we will ban it".