Everything comes in threes (at least until Saturday — more on that later), including Congressional weddings.

In early July, Rep. Barney Frank (D-Mass.) and Jim Ready did their nuptials, complete with House Minority Leader Nancy Pelosi (D-Calif.) breaking it down on the dance floor.

In a ceremony on July 21, Rep. Sander Levin (D-Mich.) tied the knot with Pamela Cole in Ferndale, Mich. The couple held a larger celebration Aug. 6 at the Levin home in Martha’s Vineyard. The Congressman’s immediate family, including his four children and 10 grandchildren, were in attendance, as was his younger brother, Sen. Carl Levin (D-Mich.).

“In sharing together the losses of each of our beloved spouses, we came to discover strong common interests, and love for one another,” Levin wrote in his a wedding announcement.

Rounding out the trio is National Republican Congressional Committee Chairman Pete Sessions (Texas). On Aug. 4, he quietly wed Karen Diebel, who unsuccessfully ran for a 2010 Congressional seat in Florida. She lost to Rep. Sandy Adams (R-Fla.).

Last year, Sessions and his first wife divorced after 27 years.

Of course, the whole “comes in three” thing is kind of blown by the upcoming wedding of Sen. Susan Collins (R-Maine) on Saturday.