diff --git a/api/queries_issue.go b/api/queries_issue.go
index 701b92039..bfdd223e5 100644
--- a/api/queries_issue.go
+++ b/api/queries_issue.go
@@ -93,19 +93,50 @@ func (a Assignees) Logins() []string {
 }
 
 type AssignedActors struct {
-	Edges []struct {
-		Node Actor
-	}
+	Nodes      []Actor
 	TotalCount int
 }
 
-// TODO kw: Display names for actors with special display names.
-func (a AssignedActors) Logins() []string {
-	logins := make([]string, len(a.Edges))
-	for i, a := range a.Edges {
-		logins[i] = a.Node.Login
+// DisplayNames returns a list of display names for the assigned actors.
+func (a AssignedActors) DisplayNames() []string {
+	// These display names are used for populating the "default" assigned actors
+	// from the AssignedActors type. But, this is only one piece of the puzzle
+	// as later, other queries will fetch the full list of possible assignable
+	// actors from the repository, and the two lists will be reconciled.
+	//
+	// It's important that the display names are the same between the defaults
+	// (the values returned here) and the full list (the values returned by
+	// other repository queries). Any discrepancy would result in an
+	// "invalid default", which means an assigned actor will not be matched
+	// to an assignable actor and not presented as a "default" selection.
+	// Not being presented as a default would cause the actor to be potentially
+	// unassigned if the edits were submitted.
+	//
+	// To prevent this, we need shared logic to look up an actor's display name.
+	// However, our API types between assignedActors and the full list of
+	// assignableActors are different. So, as an attempt to maintain
+	// consistency we convert the assignedActors to the same types as the
+	// repository's assignableActors, treating the assignableActors DisplayName
+	// methods as the sources of truth.
+	// TODO KW: make this comment less of a wall of text if needed.
+	displayNames := make([]string, len(a.Nodes))
+	for _, a := range a.Nodes {
+		if a.TypeName == "User" {
+			u := NewAssignableUser(
+				a.ID,
+				a.Login,
+				a.Name,
+			)
+			displayNames = append(displayNames, u.DisplayName())
+		} else if a.TypeName == "Bot" {
+			b := NewAssignableBot(
+				a.ID,
+				a.Login,
+			)
+			displayNames = append(displayNames, b.DisplayName())
+		}
 	}
-	return logins
+	return displayNames
 }
 
 type Labels struct {
diff --git a/api/queries_repo.go b/api/queries_repo.go
index 8f2646159..dd9027ad4 100644
--- a/api/queries_repo.go
+++ b/api/queries_repo.go
@@ -146,11 +146,16 @@ type GitHubUser struct {
 	Name  string `json:"name"`
 }
 
-// Actor is a superset of User and Bot
-// At the time of writing, it does not support Name.
+// Actor is a superset of User and Bot, among others.
+// At the time of writing, some of these fields
+// are not directly supported by the Actor type and
+// instead are only available on the User or Bot types
+// directly.
 type Actor struct {
-	ID    string `json:"id"`
-	Login string `json:"login"`
+	ID       string `json:"id"`
+	Login    string `json:"login"`
+	Name     string `json:"name"`
+	TypeName string `json:"__typename"`
 }
 
 // BranchRef is the branch name in a GitHub repository
@@ -710,6 +715,11 @@ func (m *RepoMetadataResult) MembersToIDs(names []string) ([]string, error) {
 				found = true
 				break
 			}
+			if strings.EqualFold(assigneeLogin, a.DisplayName()) {
+				ids = append(ids, a.ID())
+				found = true
+				break
+			}
 		}
 
 		if !found {
@@ -1227,7 +1237,17 @@ type AssignableBot struct {
 	login string
 }
 
+func NewAssignableBot(id, login string) AssignableBot {
+	return AssignableBot{
+		id:    id,
+		login: login,
+	}
+}
+
 func (b AssignableBot) DisplayName() string {
+	if b.login == "copilot-swe-agent" {
+		return "Copilot (AI)"
+	}
 	return b.Login()
 }
 
diff --git a/api/query_builder.go b/api/query_builder.go
index 0ef44a347..a2432673b 100644
--- a/api/query_builder.go
+++ b/api/query_builder.go
@@ -20,6 +20,25 @@ func shortenQuery(q string) string {
 	return strings.Map(squeeze, q)
 }
 
+var assignedActors = shortenQuery(`
+	assignedActors(first: 10) {
+		nodes {
+			...on User {
+				id,
+				login,
+				name,
+				__typename
+			}
+			...on Bot {
+				id,
+				login,
+				__typename
+			}
+		},
+		totalCount
+	}
+`)
+
 var issueComments = shortenQuery(`
 	comments(first: 100) {
 		nodes {
@@ -367,7 +386,7 @@ func IssueGraphQL(fields []string) string {
 		case "assignees":
 			q = append(q, `assignees(first:100){nodes{id,login,name},totalCount}`)
 		case "assignedActors":
-			q = append(q, `assignedActors(first: 10){edges{node{...on Actor{login}}},totalCount}`)
+			q = append(q, assignedActors)
 		case "labels":
 			q = append(q, `labels(first:100){nodes{id,name,description,color},totalCount}`)
 		case "projectCards":
diff --git a/pkg/cmd/issue/edit/edit.go b/pkg/cmd/issue/edit/edit.go
index 5cb789543..f3c4e46ad 100644
--- a/pkg/cmd/issue/edit/edit.go
+++ b/pkg/cmd/issue/edit/edit.go
@@ -267,7 +267,7 @@ func editRun(opts *EditOptions) error {
 		// We use Actors as the default assignees if Actors are assignable
 		// on this GitHub host.
 		if editable.Assignees.ActorAssignees {
-			editable.Assignees.Default = issue.AssignedActors.Logins()
+			editable.Assignees.Default = issue.AssignedActors.DisplayNames()
 		} else {
 			editable.Assignees.Default = issue.Assignees.Logins()
 		}
diff --git a/pkg/cmd/pr/edit/edit.go b/pkg/cmd/pr/edit/edit.go
index d484f74ed..3002c8dbe 100644
--- a/pkg/cmd/pr/edit/edit.go
+++ b/pkg/cmd/pr/edit/edit.go
@@ -239,7 +239,7 @@ func editRun(opts *EditOptions) error {
 	editable.Reviewers.Default = pr.ReviewRequests.Logins()
 	if issueFeatures.ActorIsAssignable {
 		editable.Assignees.ActorAssignees = true
-		editable.Assignees.Default = pr.AssignedActors.Logins()
+		editable.Assignees.Default = pr.AssignedActors.DisplayNames()
 	} else {
 		editable.Assignees.Default = pr.Assignees.Logins()
 	}
diff --git a/pkg/cmd/pr/shared/editable.go b/pkg/cmd/pr/shared/editable.go
index d51405acd..cc11812ae 100644
--- a/pkg/cmd/pr/shared/editable.go
+++ b/pkg/cmd/pr/shared/editable.go
@@ -411,7 +411,7 @@ func FetchOptions(client *api.Client, repo ghrepo.Interface, editable *Editable)
 	}
 	var actors []string
 	for _, a := range metadata.AssignableActors {
-		actors = append(actors, a.Login())
+		actors = append(actors, a.DisplayName())
 	}
 	var teams []string
 	for _, t := range metadata.Teams {