Gov. Pete Ricketts is fitting in a family wedding in Chicago today before leaving on a trade mission.
Ricketts will attend the wedding of his sister, Laura Ricketts. She is marrying Brooke Skinner, a brand strategist for Twitter.
Laura Ricketts was one of the leaders in the gay-rights movement in Chicago and was active in pushing for the legalization of gay marriage in Illinois, which took effect last year.
She is also the leader of LPAC, a lesbian-backed political action committee.
Pete Ricketts, who has said he loves his sister but opposes same-sex marriage, will be present for the ceremony.
He then will embark on Sunday on a 10-day trade mission to Europe, starting in Italy.