Cartoon Network Executive Resigns in Latest WarnerMedia Exit (1)

The Cartoon Network’s top executive has stepped down, joining the growing roster of former Time Warner executives departing the company following its takeover by AT&T Inc.

Christina Miller, a 14-year veteran of the company, announced her plans Wednesday in a memo to staff. She said she’ll work through the end of the year with the network’s interim management. Michael Ouweleen, who serves as chief marketing officer for kids and young adults, will become interim president, the company said.

Under the phone giant, the unit now called WarnerMedia has replaced the heads of its film and TV studio, its ...