Mark Wnek, formerly of London agency Euro RSCG Wnek Gosper Partners, has been named chief creative officer at Lowe/N.Y. Wnek replaces Gary Goldsmith, who is leaving the agency. ... Fallon/Minnepolis creative director Bobby Pearce has been named executive creative director at WestWayne in Atlanta. ... Arnold Worldwide has announced the launch of Arnold Entertainment, an L.A.-based unit devoted to developing entertainment content on behalf of the agency's clients. The division will be led by producer Teddy Lynn and Lee Einhorn, who was most recently a group creative director at Publicis & Hal Riney in San Francisco. ... Director Russ Lamoureux, formerly of Hungry Man, has signed with Biscuit Filmworks. ... Brian Mitchell, formerly an executive producer at BBDO/N.Y., has been named managing director at New York design and animation house Spontaneous. Mitchell replaces Maribeth Phillips, who has left the company. ... Thom Donahue, formerly studio manager at Clarke Goward, Boston, has joined Boston's Modernista! as senior studio designer.