World Wrestling Entertainment (WWE) chose the London-based shop after trawling through credentials from 25 agencies over the course of four months.
Seven shortlisted agencies were whittled down to three, with Frank PR winning the brief to 'take WWE to new heights of brand fame'.
Frank, led by founder Andrew Bloch, will develop consumer and CSR campaigns, as well as driving business by promoting WWE pay-per-view. The Frank account team will report to WWE comms director Claire Murphy.