Stray Kids. Photo from Stray Kids' X accountK-pop boy group Stray Kids topped the Billboard 200 albums chart with its mixtape "Hop," the music magazine reported Monday.

This marks the eighth-member group's sixth time reaching No. 1 on the Billboard 200, making Stray Kids the first act in the chart's 69-year history to debut at No. 1 with each of its first six chart entries, according to Billboard.

The group's previous Billboard 200-topping albums include "Oddinary" and "Maxident" in 2022, "5-Star" and "Rock-Star" in 2023, and "Ate" in July.

"Hop" landed at No. 1 with 187,000 equivalent album units earned in the tracking week ending on December 19, Billboard said, citing data from Luminate.

Released in Dec. 13, "Hop" consists of 13 tracks, including the single "Walkin on Water" and the members' solo songs that they have been performing in their "dominATE" tour.

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The Billboard 200 ranks the most popular albums in the United States per week, measured in equivalent album units consisting of traditional album sales, track equivalent albums, and streaming equivalent albums.