In this Marvel / DC Comics crossover back in 1996, Diana of Themyscira aka Wonder Woman is able to lift Mjölnir, Thor’s enchanted hammer. The fact that she was worthy to lift it is of massive significance, but she ultimately decides not to wield it. Here is the comic book excerpt in which Wonder Woman lifts Thor’s hammer:

And here’s a great meme pointing out that Wonder Woman’s standards are higher than Mjölnir’s:

(via: Geek Girls)