A person's attractiveness has also been found to produce a halo effect. Attractiveness provides a valuable aspect of the halo effect to consider because of its multifaceted nature; attractiveness may be influenced by several specific traits. These perceptions of attractiveness may affect judgments tied to personality traits. Physical attributes contribute to perceptions of attractiveness (e. g. , weight, hair, eye color). For example, someone who is perceived as attractive, due in part to physical traits, may be more likely to be perceived as kind or intelligent. The role of attractiveness in producing the halo effect has been illustrated through a number of studies. Recent research, for example, has revealed that attractiveness may affect perceptions tied to life success and personality. In this study, attractiveness was correlated with weight, indicating that attractiveness itself may be influenced by various specific traits. Included in the personality variables were trustworthiness and friendliness. People perceived as being more attractive were more likely to be perceived as trustworthy and friendly. What this suggests is that perceptions of attractiveness may influence a variety of other traits, which supports the concept of the halo effect.
Halo effect (sometimes called the halo error ) is the tendency for positive impressions of a person, company, brand or product in one area to positively influence one's opinion or feelings in other areas.   It is a type of cognitive bias  and is the opposite of the horn effect .
The halo effect is a type of cognitive bias in which our overall impression of a person influences how we feel and think about his or her character. Essentially, your overall impression of a person ("He is nice!") impacts your evaluations of that person's specific traits ("He is also smart!").