Caleb Logan, a well known YouTuber from the Bratayleys family, passed away suddenly at the age of 13 last week.

His death was confirmed on Friday on the Bratayley’s Instagram page, which said he “passed away of natural causes.”

“This has come as a shock to all of us,” the family also wrote.

According to Variety, data from Tubular Labs shows the family, which also consists of his sisters Annie, 10, and Hayley, 7, has racked up 1 billion views on YouTube.

“We know you tune in to watch every day and eagerly anticipate new videos, but ask that you bear with us while we deal with this tragedy as a family,” his mother, Katie, also wrote in the Instagram post.

The day before his untimely death, he was seen in a YouTube video joking around with his sisters during breakfast.

On Sunday, the family posted a 20-minute tribute to Caleb, titled "Caleb, Gone But Never Forgotten.”