Allergan is working with Joele Frank, Wilkinson Brimmer Katcher on the PR front of its $66B acquisition by Dublin-based Actavis.

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Infographic promoting the merger.

The Wall Street Journal reported Actavis, which moved its base from New Jersey to Ireland last year, could shave $240M-$370M off Irvine, Calif.-based Allergan's tax bill in 2015 with its Dublin base of operations.

Allergan makes breast implants and the blockbuster cosmetic drug Botox, logging revenue of around $6B annually. The Actavis deal means it successfully fended off a $46B hostile bid earlier this year by Bill Ackman and Canada's Valeant Pharmaceuticals.

Bonnie Jacobs is VP of corporate affairs and PR for Allergan.

Actavis has not yet been reached about outside PR counsel for the acquisition. Pharma communications vet Charlie Mayr is chief communications officer for the company.

Top JFWBK brass are advising the Actavis-Allergan deal on communications and handling media relations, including managing partner Joele Frank and vice chairman Dan Katcher.