I know when William Shatner and Nichelle Nichols (as Captain Kirk and Lt. Uhura) kissed in Star Trek, in the episode Plato's Stepchildren, it was the first interracial kiss on American TV.
But were there interracial romantic relationships in SF or F before that? I don't mean relationships involving races from other planets, but human relationships that were interracial?
It's possible to portray a romantic relationship without actually showing a kiss or direct contact. (After, for example, it was decades before American TV networks allowed a TV series to show a married couple sharing the same bed, but the couples were still known to be married.)
Are there any romantic relationships in SF or Fantasy that predate this interracial kiss? And if there are examples from print media that are earlier, are there also earlier examples on TV or film?