One of Tim Cook’s top executives could be Apple CEO in a few years. Here are his most likely replacements, report says.

• CEO Tim Cook will be staying at Apple for at least three more years, Bloomberg reported.
• Cook previously said he hopes his successor will be an internal hire.
• According to Bloomberg, execs Jeff Williams and John Ternus could be potential successors.

Tim Cook won’t be steering Apple‘s ship forever.

Cook, who succeeded Apple founder Steve Jobs, helped Apple cross the $3 trillion market cap mark — and may push the company past $4 trillion by 2025.

However, 63-year-old CEO is also thinking about who will come after him. In October, Cook told singer Dua Lipa on her podcast “At Your Service” that he hoped his successor would “come from within Apple.”