In the campaign, the 39-year-old can be seen dressed in two luxury caramel coloured coats that matched her statement red tresses perfectly.
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Her look was polished off with a brown smokey eye, a sweep of bronzer and a natural pink lip.
Although she didn't make a big deal about it, her good deed was spotted by a fellow passenger who duly tweeted her observation.
Just saw actress Amy Adams do something incredibly classy. She gave her 1st class seat to an American soldier. I'm an even bigger fan now.
- Jemele Hill (@jemelehill) June 27, 2014
LOVE AMY? See more from her in the gallery below.
MORE! Find out all the deets on Amy's random act of kindness here...
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