diff --git a/callbacks.go b/callbacks.go
index c917a678..baeb6c09 100644
--- a/callbacks.go
+++ b/callbacks.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
+	"sort"
 	"time"
 
 	"gorm.io/gorm/logger"
@@ -207,6 +208,9 @@ func sortCallbacks(cs []*callback) (fns []func(*DB), err error) {
 		names, sorted []string
 		sortCallback  func(*callback) error
 	)
+	sort.Slice(cs, func(i, j int) bool {
+		return cs[j].before == "*" || cs[j].after == "*"
+	})
 
 	for _, c := range cs {
 		// show warning message the callback name already exists
@@ -218,7 +222,11 @@ func sortCallbacks(cs []*callback) (fns []func(*DB), err error) {
 
 	sortCallback = func(c *callback) error {
 		if c.before != "" { // if defined before callback
-			if sortedIdx := getRIndex(sorted, c.before); sortedIdx != -1 {
+			if c.before == "*" && len(sorted) > 0 {
+				if curIdx := getRIndex(sorted, c.name); curIdx == -1 {
+					sorted = append([]string{c.name}, sorted...)
+				}
+			} else if sortedIdx := getRIndex(sorted, c.before); sortedIdx != -1 {
 				if curIdx := getRIndex(sorted, c.name); curIdx == -1 {
 					// if before callback already sorted, append current callback just after it
 					sorted = append(sorted[:sortedIdx], append([]string{c.name}, sorted[sortedIdx:]...)...)
@@ -232,7 +240,11 @@ func sortCallbacks(cs []*callback) (fns []func(*DB), err error) {
 		}
 
 		if c.after != "" { // if defined after callback
-			if sortedIdx := getRIndex(sorted, c.after); sortedIdx != -1 {
+			if c.after == "*" && len(sorted) > 0 {
+				if curIdx := getRIndex(sorted, c.name); curIdx == -1 {
+					sorted = append(sorted, c.name)
+				}
+			} else if sortedIdx := getRIndex(sorted, c.after); sortedIdx != -1 {
 				if curIdx := getRIndex(sorted, c.name); curIdx == -1 {
 					// if after callback sorted, append current callback to last
 					sorted = append(sorted, c.name)
diff --git a/gorm.go b/gorm.go
index c786b5a5..1ace0099 100644
--- a/gorm.go
+++ b/gorm.go
@@ -165,7 +165,7 @@ func (db *DB) Session(config *Session) *DB {
 			preparedStmt := v.(*PreparedStmtDB)
 			tx.Statement.ConnPool = &PreparedStmtDB{
 				ConnPool: db.Config.ConnPool,
-				mux:      preparedStmt.mux,
+				Mux:      preparedStmt.Mux,
 				Stmts:    preparedStmt.Stmts,
 			}
 		}
diff --git a/prepare_stmt.go b/prepare_stmt.go
index 2f4e1d57..7e87558d 100644
--- a/prepare_stmt.go
+++ b/prepare_stmt.go
@@ -9,12 +9,12 @@ import (
 type PreparedStmtDB struct {
 	Stmts       map[string]*sql.Stmt
 	PreparedSQL []string
-	mux         sync.RWMutex
+	Mux         sync.RWMutex
 	ConnPool
 }
 
 func (db *PreparedStmtDB) Close() {
-	db.mux.Lock()
+	db.Mux.Lock()
 	for _, query := range db.PreparedSQL {
 		if stmt, ok := db.Stmts[query]; ok {
 			delete(db.Stmts, query)
@@ -22,21 +22,21 @@ func (db *PreparedStmtDB) Close() {
 		}
 	}
 
-	db.mux.Unlock()
+	db.Mux.Unlock()
 }
 
 func (db *PreparedStmtDB) prepare(query string) (*sql.Stmt, error) {
-	db.mux.RLock()
+	db.Mux.RLock()
 	if stmt, ok := db.Stmts[query]; ok {
-		db.mux.RUnlock()
+		db.Mux.RUnlock()
 		return stmt, nil
 	}
-	db.mux.RUnlock()
+	db.Mux.RUnlock()
 
-	db.mux.Lock()
+	db.Mux.Lock()
 	// double check
 	if stmt, ok := db.Stmts[query]; ok {
-		db.mux.Unlock()
+		db.Mux.Unlock()
 		return stmt, nil
 	}
 
@@ -45,7 +45,7 @@ func (db *PreparedStmtDB) prepare(query string) (*sql.Stmt, error) {
 		db.Stmts[query] = stmt
 		db.PreparedSQL = append(db.PreparedSQL, query)
 	}
-	db.mux.Unlock()
+	db.Mux.Unlock()
 
 	return stmt, err
 }
@@ -63,10 +63,10 @@ func (db *PreparedStmtDB) ExecContext(ctx context.Context, query string, args ..
 	if err == nil {
 		result, err = stmt.ExecContext(ctx, args...)
 		if err != nil {
-			db.mux.Lock()
+			db.Mux.Lock()
 			stmt.Close()
 			delete(db.Stmts, query)
-			db.mux.Unlock()
+			db.Mux.Unlock()
 		}
 	}
 	return result, err
@@ -77,10 +77,10 @@ func (db *PreparedStmtDB) QueryContext(ctx context.Context, query string, args .
 	if err == nil {
 		rows, err = stmt.QueryContext(ctx, args...)
 		if err != nil {
-			db.mux.Lock()
+			db.Mux.Lock()
 			stmt.Close()
 			delete(db.Stmts, query)
-			db.mux.Unlock()
+			db.Mux.Unlock()
 		}
 	}
 	return rows, err
@@ -104,10 +104,10 @@ func (tx *PreparedStmtTX) ExecContext(ctx context.Context, query string, args ..
 	if err == nil {
 		result, err = tx.Tx.Stmt(stmt).ExecContext(ctx, args...)
 		if err != nil {
-			tx.PreparedStmtDB.mux.Lock()
+			tx.PreparedStmtDB.Mux.Lock()
 			stmt.Close()
 			delete(tx.PreparedStmtDB.Stmts, query)
-			tx.PreparedStmtDB.mux.Unlock()
+			tx.PreparedStmtDB.Mux.Unlock()
 		}
 	}
 	return result, err
@@ -118,10 +118,10 @@ func (tx *PreparedStmtTX) QueryContext(ctx context.Context, query string, args .
 	if err == nil {
 		rows, err = tx.Tx.Stmt(stmt).QueryContext(ctx, args...)
 		if err != nil {
-			tx.PreparedStmtDB.mux.Lock()
+			tx.PreparedStmtDB.Mux.Lock()
 			stmt.Close()
 			delete(tx.PreparedStmtDB.Stmts, query)
-			tx.PreparedStmtDB.mux.Unlock()
+			tx.PreparedStmtDB.Mux.Unlock()
 		}
 	}
 	return rows, err
diff --git a/tests/callbacks_test.go b/tests/callbacks_test.go
index 1dbae441..84f56165 100644
--- a/tests/callbacks_test.go
+++ b/tests/callbacks_test.go
@@ -96,6 +96,14 @@ func TestCallbacks(t *testing.T) {
 			callbacks: []callback{{h: c1}, {name: "c", h: c2}, {h: c3}, {name: "c", h: c4, replace: true}},
 			results:   []string{"c1", "c4", "c3"},
 		},
+		{
+			callbacks: []callback{{h: c1}, {h: c2, before: "c4", after: "c5"}, {h: c3}, {h: c4}, {h: c5, before: "*"}},
+			results:   []string{"c5", "c1", "c2", "c3", "c4"},
+		},
+		{
+			callbacks: []callback{{h: c1}, {h: c2, before: "c4", after: "c5"}, {h: c3, after: "*"}, {h: c4}, {h: c5, before: "*"}},
+			results:   []string{"c5", "c1", "c2", "c4", "c3"},
+		},
 	}
 
 	for idx, data := range datas {