• Marriott suffered a massive data breach, saying on Friday that the information of about 500 million people who stayed in its Starwood hotels had been compromised.
  • Marriott said that starting in 2014, hackers accessed the information of customers in its Starwood reservation database, including mailing addresses, passport info, and credit-card numbers.
  • It said that affected guests, who stayed at a Starwood property on or before September 10, would be notified “on a rolling basis” starting Friday.
  • Here’s how you can find out more about whether your information was hacked and what you can do to protect yourself.

Hackers have accessed the information of about 500 million people who stayed in Marriott’s Starwood line of hotels, the hotel chain announced Friday.

Marriott said it discovered earlier this month that hackers had access to its reservation system used for guests at Starwood hotels since 2014 and that customer information was copied and stolen.

Read more: 500 million Marriott customers have had their data hacked after staying at hotels including W, Sheraton, and Westin

The hotel chain said in a statement that it “has taken measures” to contain and investigate the breach.

Marriott said it would reach out via email to affected customers “on a rolling basis” starting Friday, but only to those whose email addresses are in the Starwood reservation system. If you stayed at a Starwood property on or before September 10, keep a look out for an email…