He died last week after collapsing while grocery shopping.
WATCH LIVE TODAY: Memorial service for SF Mayor Ed Lee at 3 p.m.
Among those expected to remember Lee on Sunday at San Francisco's city hall are U.S. Minority Leader Nancy Pelosi, and Sen. Dianne Feinstein.
The 65-year-old Lee was San Francisco's first Asian-American mayor.
The former civil rights lawyer led the city out of recession and into an economic recovery driven by technology companies.
PHOTOS: From advocacy work to light-hearted fun, see Ed Lee's career in photos
Lee's casket will not be at the ceremony. His body laid in repose at in the rotunda of city hall on Friday.
Edwin Mah Lee was born May 5, 1952, in Seattle to immigrants from China's southern province of Guangdong.
His father was a cook, and his mother a seamstress.
For those who cannot attend in person, ABC7 News will bring you live coverage from Sunday's service.
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