Actress Amy Adams almost ruined Christmas for her young nephew after revealing all about her efforts to track down her daughter's wish list for Santa.

The Enchanted star opened up about her struggles to find out what her three year old wanted under the tree during a pre-Christmas appearance on The Ellen DeGeneres Show and had no idea her sister and her son would be watching.

Adams explains, "It was hard for me to figure out what she wanted because she wouldn't tell me; she would only tell Santa - and she would tell me it was between her and Santa Claus.

"I told that story on Ellen and my nephew watched it with my sister and he was like, 'What is she talking about about Santa, mom', so that was not good, but I just left that up to her."