Glee Star Naya Rivera Presumed Dead After Going Missing, Costars React

Authorities continue to search for "Glee" star Naya Rivera after her four-year-old son, Josey, was found alone in a rented boat.

They began searching for a "possible drowning victim" in the lake after another boater found the young boy alone in the boat. According to TheWrap, Rivera was swimming with her son when she went under and never resurfaced for unknown reasons.

According to the Ventura County sheriff’s department, Rivera rented the boat at approximately 1 p.m. PT on Wednesday. It was around 4 p.m. PT that her son was found alone. It is unknown when Rivera went missing.

According to TMZ, it was her son Josey who told police that Rivera had jumped in the water and not come back up. Her life jacket was reportedly still in the boat and Josey asleep when he was found. Rivera's vehicle was found in the parking lot with her purse inside.

Investigators, helicopters, drones and a dive team returned to the lake on Thursday to continue their search, to no avail.

Best known for her work on the Fox hit "Glee," Rivera most recently appeared on the "Step Up" television series, which is moving from YouTube Red to Starz for its upcoming third season.

Rivera's "Glee" co-stars joined celebrities and fans alike with prayers that she'll be found alive, concern and fear that she won't.

On her Instagram Story, co-star Heather Morris wrote "We need all the prayers we can get to bring our Naya back home to us. We need your love and light."

Added Demi Lovato on her own page, "Please pray for @nayarivera to be found safe and sound."

See more posts below:

Her former fiance, Big Sean, also liked a series of tweets of other people praying for Rivera and updates on search efforts.

Below are the ones he reacted to: