LOS ANGELES — An upstart Hollywood company, STX Entertainment, said on Thursday that it had secured financing from two Chinese conglomerates, Tencent Holdings and PCCW, to further its ambitions in television, music and digital media.

STX also said that existing investors, including China’s Hony Capital and TPG Growth, had funneled additional money into the company, which has so far been known for midbudget movies like the drama “Free State of Jones,” a June bomb, and “Bad Moms,” a July comedy hit.

“All of these investments, combined with an increase to our credit facility, led by J.P. Morgan and Bank of America, have provided us with access to almost $700 million in new capital,” Robert Simonds, the STX chief executive, said in a companywide email. The equity stakes taken by Tencent and PCCW value the entertainment company at $1.5 billion, according to a person briefed on the deal, who spoke on the condition of anonymity to discuss private financial information.

The decision by Tencent to become an owner in STX is particularly notable. Hollywood companies of all kinds have been chasing the Chinese internet giant as a partner and investor, but Tencent, the owner of WeChat, China’s most popular messaging app, has played relatively hard to get.