The Americans are entered in doubles at the All England Club, their first tournament together since losing in the 2010 Wimbledon quarterfinals. They won the Australian Open and French Open earlier that season, part of their 12 Grand Slam doubles trophies -- to go along with the 13 won by Serena, and seven by Venus, in singles.
The only official doubles match either Williams has played since 2010 was in the Fed Cup in February, when Venus teamed with Liezel Huber to help the United States to beat Belarus.
At Wimbledon, the Williams sisters were drawn to face qualifiers Vesna Dolonc of Serbia and Olga Savchuk of Ukraine in the first round.
Play begins Monday.