Yahoo Inc. has hired a high-profile team from Gibson, Dunn & Crutcher as co-counsel to help handle the multidistrict litigation over the company’s massive data breach.

Gibson Dunn partners Theodore J. Boutrous Jr., Joshua A. Jessen, Michael Li-Ming Wong and Rachel S. Brass all entered appearances for Yahoo Tuesday. Hunton & Williams partner Ann Marie Mortimer, who has taken the lead for Yahoo’s defense thus far, confirmed by email Wednesday morning that the Gibson Dunn team will join her team as co-counsel.