Texas-born Amber was being honoured at the Austin event on Thursday (6 March) in recognition of her movie career that has included roles in The Rum Diary, Machete Kills and Paranoia.
And, although Johnny likes to keep a low profile, he showed his support for Amber by joining her at the induction ceremony.
Amber looked gorgeous in a black and nude dress and red hot stilettos, which matched her fire engine mani and statement lip.
However, we were mostly looking at that enormous rock on her engagement finger!
Despite their red carpet appearances as a couple, Amber and Johnny have kept their relationship relatively under wraps, not even commenting on their engagement.
Johnny, 50, and Amber, 27, met on the set of 2011 movie The Rum Diary and began dating the following year, after Johnny split from long-time love Vanessa Paradis, the mother of his two children: Lily Rose, 14, and 11-year-old Jack.
Amber sparked engagement rumours over the New Year when she was seen flashing a new sparkler on her finger.
A source later told People: "Amber is a female version of Johnny. She's sort of kooky and outspoken and while that would intimidate many guys, it's a turn-on for Johnny."
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Stars who have become engaged in 2014 in pictures:
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