The 33-year-old Swiss, who won five singles and nine doubles grand slam titles, returned last year with Daniela Hantuchova but found little success.
She will partner Russia's Vera Zvonareva at the All England Club.
In March she won her first title since 2007, the year of her last appearance at Wimbledon, when she triumphed with German Sabine Lisicki at the Sony Open in Miami.
Former Australian Open men's finalist Marcos Baghdatis of Cyprus has a wildcard into the men's singles.
(Reporting by Josh Reich, editing by Pritha Sarkar)
