Mark Lee Brings His Brother Into the Spotlight With 'Happiest'

Mark Lee has drawn attention for featuring his older brother, Jon, in the music video for his latest single, "Happiest."

Released Nov. 6, the song explores what happiness means beyond the expectations and standards set by society.

Fans noticed a familiar-looking figure in the music video, later revealed to be Mark's brother, who had previously appeared in teaser content.

Jon plays a prominent role in the video, appearing alongside Mark in scenes that reflect the song's themes of family and everyday happiness.

Following the release, Mark addressed the cameo on Weverse, asking fans whether they enjoyed seeing his brother and joking that Jon was indeed handsome.

He also shared Polaroid photos of the two through Upper Room's official social media accounts.

"Happiest" is an alternative pop R&B track co-written and co-composed by Mark.

The accompanying music video, directed by Colin Tilley, features winter streets and Christmas-inspired imagery. Tilley previously directed Justin Bieber's "Peaches" and The Kid LAROI and Bieber's "STAY."

The release follows Mark's September single "My Friend" and comes ahead of his upcoming studio album, "WINDMILL," set for Dec. 4.